I've had this error message ever since I installed Windows 10 x64 Professional 21H1 and can't make thumbnails on it. As you can see my username is the exact same name as my youtube channel for proof. Also if I install the one I installed the first time well it just said stuff that goes past my taskbar.
Here's a picture of my error.
Thank you,
Jacob Davidson (Mod of iiiSimplyWinii)/iiiSimplyWinii (Owner)