The Error “Unable to establish connection on channel.”, is an error that is invoked when you are working on flutter and are using firebase.
Given below is the snippet of the error you might get:
Unable to establish connection on channel.I would like to share with you the steps I took to fix the “Unable to establish connection on channel.”
Why “Unable to establish connection on channel” Error is Seen?
The error, “Unable to establish connection on channel.” is seen because of the version of the firebase interface, to fix this you could either upgrade it or downgrade it from the current version.
The platform interface at its heart appears to be the issue.
All other firebase dependencies must be changed to be compatible with the library which is causing the error, along with the addition of firebase core platform interface: 4.4.0.
It works once you downgraded all versions to the 36-day-old release.
The detailed solution to fix the error “Unable to establish connection on channel.”, is given below:
How to Fix “Unable to establish connection on channel” Error?
To fix the error, “Unable to establish connection on channel.”, use the command “flutter pub outdated” and “flutter pub upgrade firebase”, also update all of your firebase dependencies to the most recent version.
All other firebase dependencies must be changed to be compatible with the library which is causing the error.
To fix the error “Unable to establish connection on channel”, first run flutter pub outdated and flutter pub upgrade firebase_... in order to update all of your firebase dependencies to the most recent version.
If you still face the error make sure to run flutter clean and remove the pubspec.lock
In case you still face the same error you will have to downgrade all versions of firebase to the 36-day-old release.
This should fix the error “Unable to establish connection on channel.”.
Conclusion
To fix the error, “Unable to establish connection on channel.” , use flutter pub outdated and flutter pub upgrade firebase, update all of your firebase dependencies to the most recent version.
All other firebase dependencies must be changed to be compatible with the library which is causing the error. If you still face the error make sure to run flutter clean and remove the pubspec.lock.