If Save Settings Got 404 Error

Hello,
I have problem with CS-Cart 4.2.4.

If I change product or some other settings and than click Save, than I got 404 error - page not found.

PHP version is 5.6. Cache is cleared.

Where can be problem?

no help?

Please PM me temporary FTP access to your server so that we can examine the issue

I get the same issue but after I make a change and save, I go back to the dashboard and no changes take effect. I just got the license for this software.

Check all 3rd-party add-ons. Back url or form is broken for some reason.

I get the same issue but after I make a change and save, I go back to the dashboard and no changes take effect. I just got the license for this software.

Try also increase the value of the max_input_vars setting on your server