Problems with sharing screen/application

If i choose the icon sharing (no matter if I choose application or window) there are several windows popping up several times and I can not stop this

sharing is not possible

do you have a solution?

is this a custom deployment or meet.jit.si?

what do you mean with custom deployment?

I just startet meet.jit.si and then If I want to share the screen several windows in windows pops up

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