Windows 10. Up to date on OS patches. No issues until yesterday evening  (4/14).  I could not load my realm. Stated there was an error.  So I tried to load a backup...every one I tried failed. I uninstalled Minecraft and reinstalled it. Same issue. I tried to download it as well...it failed on those too. It's the only realm I've ever built.  GamerTag is The FuzzDad (Used to work for Valve a long time ago so names were weird). It's a normal realm called DeeDeePops on a 10-person subscription....maybe 20 hours effort so not that big (less than 5mb). 

I did install the latest version of inVidia drivers but it worked for a while on them.  I'm still going to uninstall them and drop back a level (see attachment pic) to see if there's anything there.  I see no software nor configuration changes made on my PC between the last time it worked and didn't. I also ran CHKDSK /F and found no errors on my drives. 

Not sure what to do other than recreate it all...but hopefully I won't have to go that far.