Hello GlyndwrB,
I also got the same error when I open a pdf file using Drawboard software. I noticed that this error only occurred when I opened files that are in my Onedrive file. If I copied the file to my desktop it works Ok. Also, opening the pdf using Edge browser works perfectly. It does seem to be an issue with some changes in Windows 11 and the applications need to be updated to accommodate it.
Regards,
Abdullah Almansour