UBB.threads PHP Forum Software Community Forums Resources and Customizing Admin Zone How do I locate the database error?

My forum went down and the usual "mysqlcheck" command didn't find any issues with the database. I ran the -r option anyway but the forums are still down.

When I go to the forum URL it shows "Database error only visible to forum administrators" but being logged out I cannot see it. What's the best way to find out what the error is?