Sorry to hear that, it sounds like you will need to restore your forum from backup
after migrating data from another forum engine to nodeBB at Maxon - @Jay-Moonah - we found that the "In categories" field in Advanced Search is empty.
We've never experienced it before, and I wonder if it's a theme issue or a data migration issue.
PS. dbsearch indexes have been successfully recreated.
Sounds like this might be an import issue that can be fixed on the next run, could you please include this in a direct email?