Admin Languages 404 Forbidden Error

[HustlaOwnz]

I'm trying to edit the text that displays on the 'checkout_success >> text_message' page, to display something different when a customer purchases a product. However, when I click 'Save' I get the 403 forbidden error with the following details:
"Forbidden

You don't have permission to access /index.php on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request."

I haven't had any other '403 Forbidden' errors in my admin panel, only when trying to edit the 'checkout_success'. I've tried setting the admin/index.php permission to 777 and also the admin folder to 777... but no luck, still the same error.

[abantecart]

Do not set 777 permission on index.php
It has to be 755

I do not see how this ca happen only in one section. All sections call index.php 

[sack]

Some solution in this regard, the same thing happens to me, AbanteCart 1.2.12, error when activating the Spanish language in the administrator.

[Basara]

Hi. Try this https://abantecart.atlassian.net/wiki/spaces/AD/pages/3604484/Mod+security+403+406+error

[sack]

  Thank you very much Basara, solved, deactivate the ModSecurity option in the CPanel corresponding to my domain and all OK.