Admin area not saving any changes

[NickOSM]

Hi there

I am using magento 1.9. I am facing a problem when I try to save anything in the backend.

Example:

System->configuration->Store Email Address : When I changed something here and hit save. then after page refresh my changes revert back to the old one. Its very confusing

I am not able to change anything from the backend.

Please let me know how to fix this

Thanks

[Meetanshi · Accepted solution]

Hi @NickOSM,
Please check var/log/system.log and var/log/exception.log file if it prints any error.

remove var/cache and var/session folder and check.

[mark_anderson3]

I am having a similar issue, it will not save any adding custom options or when adding rows to existing custom options when editing product. The var/log/system.log and var/log/exception.log file, where is this, and can I get access under cPanel? I am running 1.9.2.3 by the way

[mark_anderson3]

update:  MY ERROR LOG SAYS THIS: 

[07-Dec-2019 07:20:47 America/New_York] PHP Warning: Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini. in Unknown on line 0

I have to assume its this, and wondering how i can fix this