MyBB Community Forums

I'm encountering this problem when i have empty forums.

Type: 20
File:  (Line no. 0)
Message
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 ')
                       ORDER BY p.dateline' at line 3
Query:
                       SELECT subject, message
                       FROM ffsa3_posts p
                       WHERE pid IN()
                       ORDER BY p.dateline

2 days back one member reported the same issue in the support forum.
Why is it happening so?

---

i have activated the moderate new threads in one forum and when the user posted a new thread, i'm unable to open that thread which gave me this internal 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 ') ORDER BY p.dateline' at line 3
Query:
    SELECT subject, message FROM ffsa3_posts p WHERE pid IN() ORDER BY p.dateline 

Do you have any plugins installed?? Can you list them here?

It's Master Meta Tags.

Thanks MattRogowski