When trying to run my Flutter App on Chrome it loads a blank website and in my console I only get the message;
Launching lib\Constants\main.dart on Chrome in debug mode...
Syncing files to device Chrome...
There are no errors when I run flutter doctor and I have no problem loading up apps in the emulator.
Press F12 on Chrome and click on the Console tab to look for errors. Maybe you added something in index.html that is incorrect or there is build errors.
You can also run flutter build web to see if there's any errors.
I had the same error and solved it with flutter upgrade to the newest version.
For Flutter Web & Debug & Chrome:
A downgrade to Chrome version 84.0.4147.135 solved the issue for me.
https://www.slimjet.com/chrome/google-chrome-old-version.php
I had the same error. Please check, if in Chrome the "Dart Debug extension" is installed.
Look here: https://chrome.google.com/webstore/detail/dart-debug-extension/eljbmlghnomdjgdjmbdekegdkbabckhm
Then restart your browser. Maybe it works.