graphql-flutter not working in flutter web

[minhnhatvdl]

Describe the bug
I am using graphql-flutter v3.0.1 for a project of flutter web. Last week, it worked very well. Now, it no longer works.

I am using flutter in channel beta with version 1.12.13+hotfix.6

[MostafaHassan]

I got the same error in beta, dev and master.
Note: I only got the error on web server.
So to reproduce, run flutter build web

[ductranit]

I had the same issue. Notice for more details: it looks like there is a problem with dependency connectivity 0.4.9 which uses connectivity_for_web 0.3.0 because I got 404 error for connectivity_for_web.dart
I temporary use graphql_flutter: 3.1.0-beta.4 & it works

[GP4cK]

Here is the root cause: flutter/flutter#60855.
You can also add this to your pubspec.yml:

dependency_overrides:
  connectivity_for_web: ^0.3.1

[micimize]

Closed by #754