The error popup comes out of nowhere when navigating SSMS tree nodes, notably when selecting a specific database name. I expected it came from SQL Prompt, but there was nothing being logged even when verbose option has been enabled.

The support helped clarify it "probably" came from SQL Source Control installed recently.

Also, the "Send Error Report" never worked.

The error completely freezes SSMS as it is a modal.

It has to be dismissed multiple times and then navigated away from the selected database back to a server's name - quickly using a keyboard.