Theme Patcher (Authorization Mismatch Errors)

by Darth Apple 4 Stars 441 Downloads

Automatically resolves authorization mismatch errors on older MyBB themes.

Project Details

This plugin attempts to resolve “authorization mismatch errors” that occur on certain themes. These are necessary on any theme that was designed for MyBB 1.8.16 or older. If you encounter this error code, this should restore login functionality on your forum!
Please note that this plugin cannot fix any non-login related issues on your forum. It can ONLY patch authorization mismatch errors. If you encounter any additional problems upon installing an older theme, these issues will need to be patched manually.


- Upload the contents of the Upload folder to your forum root.
- Activate (ACP -> Plugins)
- Your themes will now be patched! You may safely deactivate.

If your forum's logins are completely broken, you may still access your admin control panel by visiting This will allow you to activate this plugin. 

Note: It is always good practice to backup your database (or export your theme) before running any plugin that modifies your templates. Although we have tested this thoroughly, it is merely a best-faith effort to patch as many themes as possible. We cannot guarantee this will work on every single theme! 

- See Readme for more details.
- Kindly translated to German courtesy of @tc4me from Smile

Github Link:


Darth Apple
2020-10-23, 09:28 PM
Last Updated
2020-10-26, 01:53 AM
Bug Tracking
MyBB Versions