This has been happening on my Windows 11 ever since I installed KB5027231 (OS Build 22621.1848). Every time I use Win+Shift+S to make a screenshot, Windows Snipping Tool fails with this (super informative) error message:
Screenshot copied to clipboard, but couldn't save.
Then I can't edit/highlight anything. I have to resort to PrtSc+ Paint app. There are many 3rd party replacements for Snipping Tool out there, but I'd like to stick with the standard one.
There are a few similar reports about this issue on the web, but I couldn't find an ultimate fix. I hope someone can help me out here.