Theme settings wont save anythig. It starts to anoy me. Nothing works good. Lot of troubles. For some, I found fix on the internet and had solved, but now when I updated theme it is still the same problem.

I get error: Invalid security credential. Please reload the page and try again.
every time I try to save settings for the theme.

Please, fix this.

If you need FTP account info I’ll provide, just solve this.