Mail shows as open but no viewer window or message window will open
I have my MacBook Pro (with Big Sur 11.1) connected to a couple of external monitors. Recently I unplugged the MacBook and took to a different location. Now in the dock it shows Mail as open (and I can force quit it) but no view window appears. I can get the Mail menus across the top of the screen, but when I tell it to open a new viewer window, nothing appears. I've force and regular quit a few times, re-booted, upgraded to 11.1, and still no fix. I can't access a Mail viewer window.
Help!
Jazimblue
iMac Pro