MyBB Common Problems and Errors Includes Fixes

Hello MyBB! I forgot I typed this up a while ago but never posted it I wanted to add on to it but thought I will post it and let the community add on to it byreplying. Hopefully this helps someone.

Error:
?Authorization code mismatch. Are you accessing this function correctly? Please go back and try again.- This error began happening in MyBB 1.8.16. You get this error because MyBB introduced some crucial changes aimed towards better security regarding users authentication in 1.8.16 and above.

Fixe:
- Add the missing code to the needed templates. - https://community.mybb.com/thread-218862.html


Error:
?Inline Moderation Not Working- There is a lot of things that cant break inline moderation like a outdated theme, outdated info in the header, plugin conflicts, javascript, etc.

Fixes:
- Change version numbers in header template and/or update 2 core files (easy). - https://community.mybb.com/thread-206896.html
- Check for duplicate jquery code in header and add jquery noconflict (old). - https://community.mybb.com/post-812202.html
- Disable all plugins and if it fixes it enable all plugins 1 by 1 until you find the plugin that is causing it and remove it. - https://community.mybb.com/thread-135587...#pid979926
- Update settings.php and the header template. - https://community.mybb.com/thread-216120.html

Common Problems and Questions:

Question:
?How can I change my forums logo?

Answers:
- Change the logo from theme settings. - https://docs.mybb.com/1.6/Help-Change-Logo/
- Overwrite the image file with another one. - https://community.mybb.com/thread-29821-...#pid200856
- Update the header template. - https://community.mybb.com/thread-122910...#pid888279


Question:
?How do I update my navigation bar?

Answer:
- Update the language file or edit the header template. - https://community.mybb.com/thread-127085.html


Question:
?How do I update the footer?

Answers:
- Updating the footer template. - https://community.mybb.com/thread-103360.html
- Footer Injection Plugin - https://community.mybb.com/mods.php?action=view&pid=919


Extra Links:
MyBB Error Messages: https://docs.mybb.com/1.8/faq/errors/
MyBB Documentation (1.8): https://docs.mybb.com
MyBB Documentation (1.6): https://docs.mybb.com/1.6/