ListView error can't run

The ListView SelectionIndex out the screen can't run
Runtime Error
Attempt to invoke virtual method
void androidx.cardview.widget.Car
dView.setBackgroundColor(int)'on
a null object reference
END APPLICATION**
My phone android 11

Are you running this on the Companion?

If so, be sure that it is up to date.

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See here, this bug is a month old and well reported on the community:

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(added to FAQ)

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