Flutter Web - PlatformException(channel-error, Unable to establish connection on channel., null, null)

[everfinal88]

Recently I integrated the firebase core and analytics into my flutter web project. Somehow when I run in localhost, it was working fine but after I deployed to production site then the error below shown in the console.

PlatformException(channel-error, Unable to establish connection on channel., null, null)

Here is my firebase version in pubspec.yaml

firebase_core: ^2.4.1
firebase_analytics: ^10.1.0

I followed every instruction in the official document, I even reinstalled the entire firebase so I'm not sure what I missing here. Did anyone know how to deal with this issue?
Any answer will be appreciated.

[Pineapples27]

It's probably too late to answer but the problem for me was the apiKey generated in firebase_options.dart was incorrect and had to be manually corrected