*Edit: Reinstalled Connect and it's working!
I was browsing my Frontpage yesterday and was being inundated with posts from a single community. To remedy this, I navigated to that community and hit the unsubscribe button in the menu. Heading back to my Frontpage brings me to the title error.
Some troubleshooting steps I've taken:
Killed & reopened Connect, signed out and signed back into Connect, signed into an alt account on Connect (worked just fine), and I even resubscribed to the community that caused the problem in the first place to undo the issue. I've subscribed to new communities to see if that would generate posts on my Frontpage but no luck there either.
Visiting my instance's subscribed page (Frontpage) in a browser populates just fine.
I'm asking anyone here for help as I don't want to bother Kuro directly for a personal issue.