Web content is not shown due to some source map errors

[zhuchuyi]

I installed and deployed the demo on my local PC following steps in README.md. When running "amplify init", there was an warning as below: ⠇ Building resource api/sensorsapi⚠️ WARNING: Schema is using an @auth directive with deprecated provider 'iam'. Replace 'iam' provider with 'identityPool' provider. So I changed the provider to identityPool and everything was OK for "amplify init", "amplify push" and "npm run dev". But when I opened it in Firefox, it was blank and some errors were shown on firefox debugger:

Source map error: JSON.parse: unexpected character at line 1 column 1 of the JSON data Resource URL: null Source Map URL: installHook.js.map

Module "events" has been externalized for browser compatibility. Cannot access "events.EventEmitter" in client code. See https://vitejs.dev/guide/troubleshooting.html#module-externalized-for-browser-compatibility for more details.

Uncaught ReferenceError: global is not defined js index.js:24 forEachArray2 index.js:12 forEach2 index.js:54 js index.js:22 __require chunk-V4OQ3NZ2.js:11 js IsTypedArrayOutOfBounds.js:11 __require chunk-V4OQ3NZ2.js:11 js TypedArrayCreateFromConstructor.js:8 __require chunk-V4OQ3NZ2.js:11 js TypedArraySpeciesCreate.js:11 __require chunk-V4OQ3NZ2.js:11 js implementation.js:16 __require chunk-V4OQ3NZ2.js:11 js index.js:6 __require chunk-V4OQ3NZ2.js:11 js index.js:4 __require chunk-V4OQ3NZ2.js:11 node_modules maplibre-gl-js-amplify.js:13657 __require chunk-V4OQ3NZ2.js:11 js constrain_feature_movement.js:7 __require chunk-V4OQ3NZ2.js:11 js move_features.js:7 __require chunk-V4OQ3NZ2.js:11 js DirectModeOverride.js:3 __require chunk-V4OQ3NZ2.js:11 js index.js:3 __require chunk-V4OQ3NZ2.js:11 AmplifyMapDraw.js:2

Source map error: No sources are declared in this source map. Resource URL: http://localhost:5173/node_modules/.vite/deps/chunk-V4OQ3NZ2.js?v=d1a7ef4f Source Map URL: chunk-V4OQ3NZ2.js.map

Source map error: No sources are declared in this source map. Resource URL: http://localhost:5173/node_modules/.vite/deps/chunk-CR7QZ4QQ.js?v=d1a7ef4f Source Map URL: chunk-CR7QZ4QQ.js.map

Source map error: No sources are declared in this source map. Resource URL: http://localhost:5173/node_modules/.vite/deps/aws-amplify.js?v=d1a7ef4f Source Map URL: aws-amplify.js.map

Source map error: No sources are declared in this source map. Resource URL: http://localhost:5173/node_modules/.vite/deps/react.js?v=d1a7ef4f Source Map URL: react.js.map

Source map error: No sources are declared in this source map. Resource URL: http://localhost:5173/node_modules/.vite/deps/maplibre-gl.js?v=d1a7ef4f Source Map URL: maplibre-gl.js.map

Source map error: JSON.parse: unexpected character at line 1 column 1 of the JSON data Resource URL: null Source Map URL: react_devtools_backend_compact.js.map