══╡ EXCEPTION CAUGHT BY GESTURE ╞═══════════════════════════════════════════════════════════════════
The following assertion was thrown while handling a gesture:
'package:flutter/src/animation/animation_controller.dart': Failed assertion: line 127 pos 15: 'vsync
!= null': is not true.

Either the assertion indicates an error in the framework itself, or we should provide substantially
more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
https://github.com/flutter/flutter/issues/new

When the exception was thrown, this was the stack:

Handler: onTap
Recognizer:
TapGestureRecognizer#c1a30(debugOwner: GestureDetector, state: possible, won arena, finalPosition:
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> For more information about diagnosing and reporting Flutter bugs, please see [https://flutter.io/bug-reports/](https://flutter.io/bug-reports/).