找不到模块“@vaadin/flow-frontend/Flow”
Cannot find module '@vaadin/flow-frontend/Flow'
Vaadin 突然停止构建我的库并出现以下错误。我已经跳了 Vaadin 舞（还有很多其他东西），但我现在 运行 没主意了。我尝试为生产构建库（但对于开发也失败了）。
我正在使用 Vaadin Flow。 Github 上的问题跟踪器已重定向到此处以获得一般社区帮助 - 所以我希望任何人都知道如何解决此问题或我可以尝试其他方法。
> Task vaadinBuildFrontend FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task 'vaadinBuildFrontend'.
> Webpack process exited with non-zero exit code.
Stderr: 'Hash: e1a6ace26ca6df86c87b
Version: webpack 4.46.0
Time: 6054ms
Built at: 12/22/2021 7:13:38 PM
Asset Size Chunks Chunk Names
VAADIN/build/vaadin-1-8595bda5c7958e210407.cache.js 894 KiB 1 [immutable]
VAADIN/build/vaadin-2-d5ce16eeb5d943cfe059.cache.js 284 KiB 2 [immutable]
VAADIN/build/vaadin-3-7d2fe309de5248ed4c09.cache.js 48.7 KiB 3 [immutable]
VAADIN/build/vaadin-4-2758512dfda3ea8392cc.cache.js 1.05 KiB 4 [immutable]
Entrypoint bundle =
[0] ./generated/vaadin.ts + 2 modules 91.2 KiB {0} [built]
| ./generated/vaadin.ts 18 bytes [built]
| ./generated/index.ts 337 bytes [built]
| ../node_modules/.pnpm/@vaadin/router@1.7.4/node_modules/@vaadin/router/dist/vaadin-router.js 90.9 KiB [built]
[1] ../node_modules/.pnpm/@vaadin/vaadin-themable-mixin@22.0.1/node_modules/@vaadin/vaadin-themable-mixin/vaadin-themable-mixin.js 7.07 KiB {2} [built]
[3] ../node_modules/.pnpm/lit@2.0.0/node_modules/lit/index.js + 3 modules 8.83 KiB {2} [built]
| ../node_modules/.pnpm/lit@2.0.0/node_modules/lit/index.js 122 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/reactive-element.js 5.89 KiB [built]
| ../node_modules/.pnpm/lit-element@3.0.2/node_modules/lit-element/lit-element.js 1.35 KiB [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/css-tag.js 1.46 KiB [built]
[4] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/spacing.js 1.42 KiB {2} [built]
[5] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/color.js 6.82 KiB {2} [built]
[6] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/style.js 1.38 KiB {2} [built]
[8] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/sizing.js 829 bytes {2} [built]
[9] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/typography.js 2.99 KiB {2} [built]
[27] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/version.js 313 bytes {2} [built]
[43] ../node_modules/.pnpm/@vaadin/button@22.0.1/node_modules/@vaadin/button/theme/lumo/vaadin-button.js 73 bytes {1} [built]
[80] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/icons.js + 2 modules 31.5 KiB {2} [built]
| ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/icons.js 276 bytes [built]
| ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/iconset.js 15.5 KiB [built]
| ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/vaadin-iconset.js 15.7 KiB [built]
[188] ../node_modules/.pnpm/@vaadin/common-frontend@0.0.17_lit@2.0.0/node_modules/@vaadin/common-frontend/ConnectionIndicator.js + 14 modules 35.9 KiB {2} [built]
| ../node_modules/.pnpm/@vaadin/common-frontend@0.0.17_lit@2.0.0/node_modules/@vaadin/common-frontend/ConnectionIndicator.js 14.3 KiB [built]
| ../node_modules/.pnpm/tslib@2.3.1/node_modules/tslib/tslib.es6.js 11.5 KiB [built]
| ../node_modules/.pnpm/lit@2.0.0/node_modules/lit/decorators.js 525 bytes [built]
| ../node_modules/.pnpm/lit@2.0.0/node_modules/lit/directives/class-map.js 85 bytes [built]
| ../node_modules/.pnpm/@vaadin/common-frontend@0.0.17_lit@2.0.0/node_modules/@vaadin/common-frontend/ConnectionState.js 4.36 KiB [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/custom-element.js 364 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/property.js 572 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/state.js 225 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/event-options.js 280 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/query.js 612 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/query-all.js 388 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/query-async.js 392 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/query-assigned-nodes.js 603 bytes [built]
| ../node_modules/.pnpm/lit-html@2.0.2/node_modules/lit-html/directives/class-map.js 1.1 KiB [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/base.js 666 bytes [built]
[217] ../node_modules/.pnpm/@vaadin/polymer-legacy-adapter@22.0.1/node_modules/@vaadin/polymer-legacy-adapter/style-modules.js + 1 modules 4.38 KiB {2} [built]
| ../node_modules/.pnpm/@vaadin/polymer-legacy-adapter@22.0.1/node_modules/@vaadin/polymer-legacy-adapter/style-modules.js 191 bytes [built]
| ../node_modules/.pnpm/@vaadin/polymer-legacy-adapter@22.0.1/node_modules/@vaadin/polymer-legacy-adapter/src/style-modules.js 4.17 KiB [built]
[222] ../build/frontend/generated-flow-imports-fallback.js + 56 modules 104 KiB {3} [built]
| ../build/frontend/generated-flow-imports-fallback.js 9.98 KiB [built]
| ./basic/variables.css 943 bytes [built]
| ./images/cropper/cropper.css 778 bytes [built]
| ./basic/spacer.css 116 bytes [built]
| ./tab-box/tab-box.css 458 bytes [built]
| ./text/text-area.css 103 bytes [built]
| ./buttons/internal-button.css 104 bytes [built]
| ./layouts/br-app-layout.css 206 bytes [built]
| ./buttons/flat-icon-button.css 242 bytes [built]
| ./modal/raven-modal.css 219 bytes [built]
| ./headings/headings.css 60 bytes [built]
| ./layouts/br-horizontal-layout.css 150 bytes [built]
| ./text/text-line-with-icon.css 182 bytes [built]
| ./input/br-inline-edit.css 159 bytes [built]
| ./buttons/action-button.css 890 bytes [built]
| + 42 hidden modules
[223] ../build/frontend/generated-flow-imports.js + 1 modules 1.72 KiB {4} [built]
| ../build/frontend/generated-flow-imports.js 1.41 KiB [built]
| ../build/flow-frontend/lumo-includes.ts 276 bytes [built]
+ 209 hidden modules
ERROR in ./generated/index.ts
Module not found: Error: Can't resolve '@vaadin/flow-frontend/Flow' in '/XXX/frontend/generated'
@ ./generated/index.ts 2:0-50 3:33-37
@ ./generated/vaadin.ts
ERROR in chunk bundle [entry]
VAADIN/build/vaadin-bundle-ca5b59ddaf6cebb1e7aa.cache.js
/XXX/node_modules/.pnpm/esbuild-loader@2.15.1_webpack@4.46.0/node_modules/esbuild-loader/dist/index.js??ref--4!/XXX/frontend/generated/vaadin.ts a8f7ce42c2f8c5128bbf70605fdcb37b
Unexpected token (4:33)
|
|
| const { serverSideRoutes } = new !(function webpackMissingModule() { var e = new Error("Cannot find module '@vaadin/flow-frontend/Flow'"); e.code = 'MODULE_NOT_FOUND'; throw e; }())({
| imports: () => Promise.all(/* import() */[__webpack_require__.e(2), __webpack_require__.e(4)]).then(__webpack_require__.bind(null, 223))
| });
ERROR in frontend/generated/index.ts:17:22
TS2307: Cannot find module '@vaadin/flow-frontend/Flow' or its corresponding type declarations.
15 |
16 | // import Flow module to enable navigation to Vaadin server-side views
> 17 | import { Flow } from '@vaadin/flow-frontend/Flow';
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
18 |
19 | const { serverSideRoutes } = new Flow({
20 | imports: () => import('../../build/frontend/generated-flow-imports')
Child HtmlWebpackCompiler:
Asset Size Chunks Chunk Names
__child-HtmlWebpackPlugin_0 4.4 KiB 0 HtmlWebpackPlugin_0
Entrypoint HtmlWebpackPlugin_0 = __child-HtmlWebpackPlugin_0
[0] ../node_modules/.pnpm/html-webpack-plugin@4.5.1_webpack@4.46.0/node_modules/html-webpack-plugin/lib/loader.js!./index.html 830 bytes {0} [built]
<i> [build-status] 3 errors and 0 warnings were reported.
<i> [build-status] : Failed to compile.
'
// 编辑 1
我已经尝试了所有这些（按此顺序）：
rm -rf ~/.pnpm-store ~/.vaadin
rm -rf package.json pnpm-lock.json pnpmfile.json tsconfig.json webpack.config.js webpack.generated.js .npmrc frontend/generated/ frontend/index.html build/ target/ node_modules pnpm-lock.yaml pnpmfile.js types.d.ts
./gradlew vaadinClean && ./gradlew vaadinPrepareFrontend && ./gradlew vaadinBuildFrontend
我在从 V21 迁移到 V22 时遇到了同样的问题。我通过删除目标文件夹（以及根文件夹中生成的文件，如 tsconfig 等）并再次重建来修复它。之后工作完美，没有进一步的问题。我怀疑 V21 的目标文件夹中有一些东西并混淆了构建。
我通过逐步重建生产和测试失败的地方找到了解决方案。
TL;DR: 如果您不使用 com.vaadin:vaadin-core
，则包括依赖项 com.vaadin:flow-client
正如我所说，我尝试构建一个 Vaadin 库（以在不同节点之间共享组件）。因此，我没有包括依赖项 com.vaadin:vaadin-core 但我实际需要的依赖项（也是为了避免传递依赖项的版本冲突）。
由于某些原因（可能是因为升级了 Vaadin 版本），我现在还需要依赖项 com.vaadin:flow-client。如果没有这种特定的依赖关系，则可以重现上述错误。
Vaadin 突然停止构建我的库并出现以下错误。我已经跳了 Vaadin 舞（还有很多其他东西），但我现在 运行 没主意了。我尝试为生产构建库（但对于开发也失败了）。
我正在使用 Vaadin Flow。 Github 上的问题跟踪器已重定向到此处以获得一般社区帮助 - 所以我希望任何人都知道如何解决此问题或我可以尝试其他方法。
> Task vaadinBuildFrontend FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task 'vaadinBuildFrontend'.
> Webpack process exited with non-zero exit code.
Stderr: 'Hash: e1a6ace26ca6df86c87b
Version: webpack 4.46.0
Time: 6054ms
Built at: 12/22/2021 7:13:38 PM
Asset Size Chunks Chunk Names
VAADIN/build/vaadin-1-8595bda5c7958e210407.cache.js 894 KiB 1 [immutable]
VAADIN/build/vaadin-2-d5ce16eeb5d943cfe059.cache.js 284 KiB 2 [immutable]
VAADIN/build/vaadin-3-7d2fe309de5248ed4c09.cache.js 48.7 KiB 3 [immutable]
VAADIN/build/vaadin-4-2758512dfda3ea8392cc.cache.js 1.05 KiB 4 [immutable]
Entrypoint bundle =
[0] ./generated/vaadin.ts + 2 modules 91.2 KiB {0} [built]
| ./generated/vaadin.ts 18 bytes [built]
| ./generated/index.ts 337 bytes [built]
| ../node_modules/.pnpm/@vaadin/router@1.7.4/node_modules/@vaadin/router/dist/vaadin-router.js 90.9 KiB [built]
[1] ../node_modules/.pnpm/@vaadin/vaadin-themable-mixin@22.0.1/node_modules/@vaadin/vaadin-themable-mixin/vaadin-themable-mixin.js 7.07 KiB {2} [built]
[3] ../node_modules/.pnpm/lit@2.0.0/node_modules/lit/index.js + 3 modules 8.83 KiB {2} [built]
| ../node_modules/.pnpm/lit@2.0.0/node_modules/lit/index.js 122 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/reactive-element.js 5.89 KiB [built]
| ../node_modules/.pnpm/lit-element@3.0.2/node_modules/lit-element/lit-element.js 1.35 KiB [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/css-tag.js 1.46 KiB [built]
[4] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/spacing.js 1.42 KiB {2} [built]
[5] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/color.js 6.82 KiB {2} [built]
[6] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/style.js 1.38 KiB {2} [built]
[8] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/sizing.js 829 bytes {2} [built]
[9] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/typography.js 2.99 KiB {2} [built]
[27] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/version.js 313 bytes {2} [built]
[43] ../node_modules/.pnpm/@vaadin/button@22.0.1/node_modules/@vaadin/button/theme/lumo/vaadin-button.js 73 bytes {1} [built]
[80] ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/icons.js + 2 modules 31.5 KiB {2} [built]
| ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/icons.js 276 bytes [built]
| ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/iconset.js 15.5 KiB [built]
| ../node_modules/.pnpm/@vaadin/vaadin-lumo-styles@22.0.1/node_modules/@vaadin/vaadin-lumo-styles/vaadin-iconset.js 15.7 KiB [built]
[188] ../node_modules/.pnpm/@vaadin/common-frontend@0.0.17_lit@2.0.0/node_modules/@vaadin/common-frontend/ConnectionIndicator.js + 14 modules 35.9 KiB {2} [built]
| ../node_modules/.pnpm/@vaadin/common-frontend@0.0.17_lit@2.0.0/node_modules/@vaadin/common-frontend/ConnectionIndicator.js 14.3 KiB [built]
| ../node_modules/.pnpm/tslib@2.3.1/node_modules/tslib/tslib.es6.js 11.5 KiB [built]
| ../node_modules/.pnpm/lit@2.0.0/node_modules/lit/decorators.js 525 bytes [built]
| ../node_modules/.pnpm/lit@2.0.0/node_modules/lit/directives/class-map.js 85 bytes [built]
| ../node_modules/.pnpm/@vaadin/common-frontend@0.0.17_lit@2.0.0/node_modules/@vaadin/common-frontend/ConnectionState.js 4.36 KiB [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/custom-element.js 364 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/property.js 572 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/state.js 225 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/event-options.js 280 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/query.js 612 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/query-all.js 388 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/query-async.js 392 bytes [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/query-assigned-nodes.js 603 bytes [built]
| ../node_modules/.pnpm/lit-html@2.0.2/node_modules/lit-html/directives/class-map.js 1.1 KiB [built]
| ../node_modules/.pnpm/@lit/reactive-element@1.0.2/node_modules/@lit/reactive-element/decorators/base.js 666 bytes [built]
[217] ../node_modules/.pnpm/@vaadin/polymer-legacy-adapter@22.0.1/node_modules/@vaadin/polymer-legacy-adapter/style-modules.js + 1 modules 4.38 KiB {2} [built]
| ../node_modules/.pnpm/@vaadin/polymer-legacy-adapter@22.0.1/node_modules/@vaadin/polymer-legacy-adapter/style-modules.js 191 bytes [built]
| ../node_modules/.pnpm/@vaadin/polymer-legacy-adapter@22.0.1/node_modules/@vaadin/polymer-legacy-adapter/src/style-modules.js 4.17 KiB [built]
[222] ../build/frontend/generated-flow-imports-fallback.js + 56 modules 104 KiB {3} [built]
| ../build/frontend/generated-flow-imports-fallback.js 9.98 KiB [built]
| ./basic/variables.css 943 bytes [built]
| ./images/cropper/cropper.css 778 bytes [built]
| ./basic/spacer.css 116 bytes [built]
| ./tab-box/tab-box.css 458 bytes [built]
| ./text/text-area.css 103 bytes [built]
| ./buttons/internal-button.css 104 bytes [built]
| ./layouts/br-app-layout.css 206 bytes [built]
| ./buttons/flat-icon-button.css 242 bytes [built]
| ./modal/raven-modal.css 219 bytes [built]
| ./headings/headings.css 60 bytes [built]
| ./layouts/br-horizontal-layout.css 150 bytes [built]
| ./text/text-line-with-icon.css 182 bytes [built]
| ./input/br-inline-edit.css 159 bytes [built]
| ./buttons/action-button.css 890 bytes [built]
| + 42 hidden modules
[223] ../build/frontend/generated-flow-imports.js + 1 modules 1.72 KiB {4} [built]
| ../build/frontend/generated-flow-imports.js 1.41 KiB [built]
| ../build/flow-frontend/lumo-includes.ts 276 bytes [built]
+ 209 hidden modules
ERROR in ./generated/index.ts
Module not found: Error: Can't resolve '@vaadin/flow-frontend/Flow' in '/XXX/frontend/generated'
@ ./generated/index.ts 2:0-50 3:33-37
@ ./generated/vaadin.ts
ERROR in chunk bundle [entry]
VAADIN/build/vaadin-bundle-ca5b59ddaf6cebb1e7aa.cache.js
/XXX/node_modules/.pnpm/esbuild-loader@2.15.1_webpack@4.46.0/node_modules/esbuild-loader/dist/index.js??ref--4!/XXX/frontend/generated/vaadin.ts a8f7ce42c2f8c5128bbf70605fdcb37b
Unexpected token (4:33)
|
|
| const { serverSideRoutes } = new !(function webpackMissingModule() { var e = new Error("Cannot find module '@vaadin/flow-frontend/Flow'"); e.code = 'MODULE_NOT_FOUND'; throw e; }())({
| imports: () => Promise.all(/* import() */[__webpack_require__.e(2), __webpack_require__.e(4)]).then(__webpack_require__.bind(null, 223))
| });
ERROR in frontend/generated/index.ts:17:22
TS2307: Cannot find module '@vaadin/flow-frontend/Flow' or its corresponding type declarations.
15 |
16 | // import Flow module to enable navigation to Vaadin server-side views
> 17 | import { Flow } from '@vaadin/flow-frontend/Flow';
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
18 |
19 | const { serverSideRoutes } = new Flow({
20 | imports: () => import('../../build/frontend/generated-flow-imports')
Child HtmlWebpackCompiler:
Asset Size Chunks Chunk Names
__child-HtmlWebpackPlugin_0 4.4 KiB 0 HtmlWebpackPlugin_0
Entrypoint HtmlWebpackPlugin_0 = __child-HtmlWebpackPlugin_0
[0] ../node_modules/.pnpm/html-webpack-plugin@4.5.1_webpack@4.46.0/node_modules/html-webpack-plugin/lib/loader.js!./index.html 830 bytes {0} [built]
<i> [build-status] 3 errors and 0 warnings were reported.
<i> [build-status] : Failed to compile.
'
// 编辑 1
我已经尝试了所有这些（按此顺序）：
rm -rf ~/.pnpm-store ~/.vaadin
rm -rf package.json pnpm-lock.json pnpmfile.json tsconfig.json webpack.config.js webpack.generated.js .npmrc frontend/generated/ frontend/index.html build/ target/ node_modules pnpm-lock.yaml pnpmfile.js types.d.ts
./gradlew vaadinClean && ./gradlew vaadinPrepareFrontend && ./gradlew vaadinBuildFrontend
我在从 V21 迁移到 V22 时遇到了同样的问题。我通过删除目标文件夹（以及根文件夹中生成的文件，如 tsconfig 等）并再次重建来修复它。之后工作完美，没有进一步的问题。我怀疑 V21 的目标文件夹中有一些东西并混淆了构建。
我通过逐步重建生产和测试失败的地方找到了解决方案。
TL;DR: 如果您不使用 com.vaadin:vaadin-core
com.vaadin:flow-client
正如我所说，我尝试构建一个 Vaadin 库（以在不同节点之间共享组件）。因此，我没有包括依赖项 com.vaadin:vaadin-core 但我实际需要的依赖项（也是为了避免传递依赖项的版本冲突）。
由于某些原因（可能是因为升级了 Vaadin 版本），我现在还需要依赖项 com.vaadin:flow-client。如果没有这种特定的依赖关系，则可以重现上述错误。