An unusual bug in 10.4 where an unexpected dialog can appear when debugging has a workaround: temporarily disable the Welcome screen.
Update July 21st, 2020
10.4 Patch #2 solves this problem. Please install it instead of using the below workaround.
Original Post
There is a bug in RAD Studio 10.4 where, when debugging, you may get a dialog you did not expect appear at apparently random times. It…