I knew silly things like these would happen when one just copies and pastes whatever is in the box. No, that's not how it works... (see below)
Open member.php file
If you use vBulletin 3.6.6 and above, use the
only the code box below
Code:
FIND
SELECT pf.profilefieldid
Replace With
SELECT pf.profilefieldid, pf.searchable
If you use vBulletin 3.6.5 and below, use the
only the code box below
Code:
FIND
SELECT profilefieldid
Replace With
SELECT profilefieldid, searchable