Run time error - unable to add window -- token [email protected] is not valid; is your activity running?

Run time error - unable to add window – token [email protected] is not valid; is your activity running??

please help me how i can resole it

“How to switch screens correctly”. Search it

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i used 3 screen it worked perfectly but when i used notifier for exit screen then it show this error. i delete that but still it show

In my opinion there’s a bug in Kodular as there are no such problems with switching screens in AppInventor or Thunkable

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