E/flutter (21270): [ERROR:flutter/shell/common/shell.cc(181)] Dart Error: Unhandled exception:
E/flutter (21270): FormatException: Invalid group(?<=\/r\/).*(?=\/)
E/flutter (21270): #0      new _RegExp (dart:core/runtime/libregexp_patch.dart:189:57)
E/flutter (21270): #1      new RegExp (dart:core/runtime/libregexp_patch.dart:23:15)
E/flutter (21270): #2      main (file://~~~~~~/lib/main.dart:26:16)
E/flutter (21270): <asynchronous suspension>
E/flutter (21270): #3      _startIsolate.<anonymous closure> (dart:isolate/runtime/libisolate_patch.dart:289:19)
E/flutter (21270): #4      _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)