Suddenly Cannot Debug Typescript: DevTools failed to load SourceMap: Could not load content for .... Unknown Error

Solution 1:

There really is a problem with my Android Emulator. I tried to create another emulator with different API Level. It works, I suppose removing the emulator from AVD Manager in Android Studio and re-create it, does not really reset the emulator.

My problematic emulator was in API 30 after I create API 29 and debug in it, it works fine.