Prestashop translation problems 403

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Hi guys. I have setup a simple default store on prestashop 1.6.1.5. The store language is Romanian. I want to translate some of the back modules, but i keep on getting 403 forbidden on submission of translation. I have looked all over the internet for fixes, I have no idea what to do, I have checked to yes and no to the SEO and URL settings of Apache mod_security mode, I have manually edited my .htaccess tosome of the forums, and then default, updated all modules and prestashop core to latest versions. Initially it was prestashop 1.6.1.4 and now is 1.6.1.5. Still get the same problems, even given to all the admin files 755, and back to 644 and still got the problem. How to fix this, its kind of urgent. I also emailed and talekd with the hosting ROMARG, they have no issues on their side.  

[vekia]

it's probably because hosting security settings

please verify if your host allows to sent many input boxes. this problem is so-called max input vars problem.

 

some hosts displays notifications about this problem, some blocks requests like your host.