MyBB Community Forums

I'm getting this error:

Authorisation code mismatch. Are you accessing this function correctly? Please go back and try again.

This occurs when I try to subscribe to a forum or thread, or when trying to remove thread/forum subscriptions from my User CP.

Any ideas on how to fix it?

try checking out this thread.
http://community.mybboard.net/thread-67956.html

reverting the templates worked for me, but keep in mind that any template changes will be lost and need to be redone.

I checked for any updated templates but there are none.

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Fixed.

Lithium: How did you end up fixing this? I'm having the same error when subscribing to a thread on my board at the moment.

I believe, I reverted the templates and that seemed to fix it.

There indeed seems to have been a change in the showthread template in a recent version for the 'subscribe to this thread' link.

Fixed it here too. Thanks.