I have similar problem started just recently.
Epson WF-2660 (not especially old!)
Epson Scan, when run, appears on task bar but never opens a proper dialog window.
It can sometimes be closed by right click "Close window" but takes at least two attempts and then the windows "trying to solve.." dialog needs to be clicked away.
About a quarter the time it can't be closed and hangs THE WHOLE OF WINDOWS (10) which shouldn't even be possible these days! Then it takes a 12 second button press to stop the machine.
Tried uninstalling all Epson programs and drivers, re-installed from scratch and still no change.
Tried "compatibility mode" but no improvement there.
Tried running as Admin but no difference.
It seems to be completely broken.