MyBB Community Forums

When I use the search box on my portal page, I get this error:

SQL Error:
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND t.fid NOT IN (0) AND t.visible>-1 AND t.closed NOT LIKE 'moved|%'' at line 1
Query:
SELECT t.tid FROM mybb_threads t WHERE AND t.fid NOT IN (0) AND t.visible>-1 AND t.closed NOT LIKE 'moved|%'

What do I need to do to fix it?

if you have recently installed a search related plugin (eg. unwanted forum search) then deactivate that & check ...

Yes, that's it! Now what can I do to make that search box work with the unwanted forum search plugin?