I got the very same issue with my MOTO Z1.
And I got the answer from Embarcadero Site: Android OS 8.1 will be required for debug feature from 10.4
I got a Google Pixel 4 with Android 10, and the debug feature works without error prompt message.
However, the breakpoint stops only when I select "Android 64", and it does not work while I select "Android 32".
Share the above experience with you guys.
Best Regards,
Dennies Chang.