Flutter for Web: webdev serve throws error: webdev could not find pubspec.yaml in "C:\...."

Question

I am trying to run a Flutter for web project, which was working just fine, until I ran flutter packages run, after which webdev serve gives the error above. My project is located in a different directory, E:\Flutter_web_try to be specific, which has a pubspec.yaml file.

I have already tried flutter pub pub packages get, reinstalling flutter, deactivating and reactivating webdev but none of those have worked. No new flutter_web project I create is running either, and throws the same error. I have also tried installing a fresh version of Flutter, with the env variables changed, but still the error remained the same.

webdev could not run for this project.
Could not find a file named "pubspec.yaml" in "C:\Users\Sanchit\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\protobuf-0.13.12".```

It should run properly, and tell me the default port at which the project is being served on, which it did before the flutter packages get command.

Answer 1

You're having that issue because your webdev path is not setup correctly. If you still want to run your web app, go to that path and execute:

flutter packages pub global run webdev serve

Same thing if you want to build your web app to release:

flutter packages pub global run webdev build

be sure to finish your webdev serve (control + c) before building or is not going to work.