Unfortunately, your screenshot didn’t come through, so we can’t see that just yet. That said, I think we can figure out what’s going on here.
Let’s start with correctly chowning our files back. Sometimes things go down and we can’t explain it and we do a lot of changes that seem innocuous, but will always come back to bite us in the end.
Make sure all the servers are down, prior to doing this. A reboot isn’t necessary, but commonly done. Then you’d log back into the webui as your normal, non-root user and go back again. These steps also imply you only have a single user you care about within the webui. If you had more users, the steps would look just more like chown-ing directories with their existing perms just to get their children files.
Other explanations include that you had upgraded a lot of programs before but did not reboot, and the new versions took place after the power outage resumed–that’s a more far-fetched idea, but not impossible if it was Java.
If the issue persists, show us again with a new attempt at that screenshot, or use imgur, etc.