Hi Thomas,
Thank you for your support.
I have spoken with the hosting company and the error was due Because the ModSecurity was blocked. So we have added this rule to the white list, adding a rule (SecRuleRemoveById) to the .htaccess. With this it is already solved.
Thanks
Hi Thomas,
Thanks for your answer! I am not a developer and I never accessed to the server, as soon as I find out how to get that information I will send it to you. Thank you very much!