I ran CCleaner and fixed all the errors it showed (nothing seemed related to cache, though). Rebooted; It's still not working. I've also tried to reset the IE settings, but I don't seem to have IE on my computer anymore. I can't find anything related to resetting more than home page and bookmarks, but I reset those to be safe. Still nothing.
At this point, I'm thinking I may just need to reinstall Windows.
EDIT June 22, 2024: The error does not show when I am offline. Probably makes sense, but I thought I'd make note of it in case it means something. I can download bookmarked trainers for use offline if I dismiss the error message, but I can't use the search while on- or offline.
EDIT July 2, 2024: I don't know why this worked, but I no longer have the error message. I followed the guide at
Link to fix a Windows Store issue and it fixed this problem as well. Note that I had to also reclaim ownership of my specific user directory under C:\Users after following the guide. Hope this helps someone else who has a similar issue.
[Edited by pmonk1487, 7/2/2024 3:03:27 PM]