This is quite a common issue that usually occurs in flutter release builds. More often than not the issue is caused by ProGuard stripping away some required APIs at build time, leading to missing implementation exceptions such as the one below. That being said, there are actually multiple possible causes to this issue, as such…
This error occurs when attempting to call a method on a null object reference. No such method exists because the call target is null or unassigned. For instance: will fail with a NoSuchMethod error whenever foo is null. The error will say: NoSuchMethod: the method ‘bar’ was called on null. This is the equivalent of…
This can be fixed in two simple steps:
The most likely cause of this error is an update to Flutter (flutter upgrade) which led to some imcompatibility with your existing code or your project’s dependencies. The Theme.of(context).accentColor property has been deprecated since Flutter 1.17 and is entirely removed from the current version, thus the error your are seeing. What to use instead Or, if…