I have the same issue. The UI keeps shifting between the tab you're actually in and then this error screen, which is normally a log pag.
I don't don't what the real rrot cause is, but what you see i guess is a symptom of you starting the SIAD twice - try to shut everythign down and restart the PC, but it might not fix the real issue, that I also struggle to understand what is - perhaps an error introduced in 1.3.3 that I see you're also on.