412 Error

Hi, I am trying to update my tempera settings, but when i try to save I get a 412 Error message saying:

“Your request got filtered out due to possible security issues.

One or more things in your request were suspicious (defective request header, invalid cookies, bad parameters)

If you think you did nothing wrong:

1. try again in a different browser (I did)
2. avoid any evil characters inside the requesr url (no idea what this means)

If you are the owner of the website, you can consider revising the rules of the mod_security or turning it off from your webhosting control panel.

I also tried deactivating all my plugins to see if that would help, but it did not. I do not get this error message from any other themes. Any ideas why this might be happening?

Jess