[2022] CK III - Can't see map screenshots

If you revert to the previous patch in the Steam Betas tab for this game, does that still happen?

And, what antivirus appo do you use? Make sure the new ck3.exe is allowed through it.

And finally, does a Steam screenshot work?  

When you posted this thread 1.5.1 was the current version and this function worked the way you wanted it to. Now 1.5.1 does not work the way you want. Is that right?

If so, there pretty much has to be something else in your system that is causing this for you. Hard to guess what though!

Does this happen with all mods disabled?

What antivirus app do you use?  

I just tested this with 1.6, and shift-f11 makes a .png file in the screenshot folder.

How f11 and f12 work normally for you but shift-f11 does not I cannot imagine!