We recently migrated a very large forum from vBulletin 5 to xenForo 2 The migration caused allot of broken backlinks (404s) because the url structures have changed. We already did a few 301 redirects to fix allot of them but there are more that need to be fixed. Xenforo2 handles some internal redirects automatically by re-routing.
I have a problem with my running vBulletin 5 forum. Channels have suddenly disappeared yesterday after my webmaster installed PHP 7 and updated MySQL. It looked like everything was working 100% until I realized that channels were gone. Channels are still in the database, together with posts, but they won't be displayed as sub-channels, so no data is