MyBB Community Forums

Please help.

Here is the error message:
http://i.imgur.com/uFHfBfI.png

I noticed a problem last night as I was posting a reply to a thread on the forum. I was using the quick replay feature at the bottom of the page. I clicked 'Reply' and then the "Please wait Loading" with the spinning circle appeared. The javascript/ajax thing or whatever that displays on top of the page. It just never ended so I decided to back out of the page and then try again. After that the forum was slow..

Please advise what I need to do

edit/
I am running an older version of MyBB. I hadn't had time to upgrade to the latest. But I will do so once this is resolved.

you can run below SQL query (see SQL queries guidance if required)

REPAIR TABLE `mybb_sessions` 

Excellent thanks. I got this:

mybb_sessions repair warning Number of rows changed from 748 to 745
mybb_sessions repair status OK

but looks like all is good now. I appreciate the help.