Hello, I had that issue recently. I pretty sure it was the following discussion that lead me to success. Things described in here can look different in your template. If you have a little bit of a brain you should be able to get what I mean. If you still need help Im happy to help you :D
Discussion:https://community.mybb.com/thread-92582-post-675342.html#pid675342
EDIT:https://community.mybb.com/thread-218862.html
I think this is it. If you still need help Im glad to fix it for you. For free of course. Just send me a DM so I can do it. I couldeither do itby getting admin access
for like 10 minutes on your forum or by you doing screensharing with me.
Regards.
MyBB Support
Authorization code mismatch. Are you accessing this function correctly? Please go bac
Submitted by Aurora, 26-09-2018, 01:32 AM, Thread ID: 102328
Thread Closed