Please help! Language adding shows 404 error

[gelatinsilver]

Hello! I have a strange problem. Generally site works well, but when I'm installing any language extension and trying to switch on (or edit) it in System>Localization>Language the site shows 404 error. Please, help. I appreciate for any suggestions.

P.S.
Also 404 arises when I'm trying to add new language in System>Localization>Language

Adding and editing currencies are working fine.

If it helps: Site is whitelabeled and goes under SSL and redirected from http to https via htaccess

[Basara]

Hello.

Please check your error log just after you got an error

[gelatinsilver]

Hello!
Thank you for the quick respond, the matter is that no errors highlighted in the errors log, just when I press "+" button in "System>Localization>Language" I'm getting 404 error.

This page shows 404
/index.php?rt=localisation/language/insert&s=xxxxxxxx&token=xxxxxxxx

And this page is ok
/index.php?rt=localisation/currency/insert&s=xxxxxxxx&token=xxxxxxxx

[Basara]

Hello

Try http://docs.abantecart.com/pages/tips/troubleshooting.html#mod_security

[gelatinsilver]

Yes, I tried, but the result is the same.

[gelatinsilver]

Have you any idea why it happens? I tried to switch off the https, tried to disable mod_security. Seems this is a core bug or something else. Any way I'm very sad with the fact that I can't add a new language to the site.

[Basara]

Most of hosting do not allow you to disable mod_secure. Are you sure you disable it?

Did you check file permissions? Are the accessible?

[gelatinsilver]

index.php is 644, I tried 755 - the same result
I included the following directive in htaccess and nothing changed
<IfModule mod_security.c>
SecFilterInheritance Off
</IfModule>

[Basara]

If you add this does not mean it work. Most of hostings limit users with .htaccess and php.ini commands

[gelatinsilver]

So, you advise to ask hosting provider to disable mod_security? Ok, I'll try, not sure that this will help, but thank you.

[Basara]

Problem not in disable or enable mod_secure. Usually hosting administrator should configure it correctly 

[gelatinsilver]

Can you please write the correct configuration for mod_security, so I'll be able to ask provider to configure it properly. Thank you.

[gelatinsilver]

SOLVED, thank you! The matter was exactly in the apache's mod_security, it must be switched off via CPanel and not htaccess.