Returned 403 Fordbidden facebook

I am trying to find out how to enable permission for facebook to be able to make a request on my domain, the entire url it answers me with error 403. Can anyone know how to unbind this permission if it is in the firewall or in the htacces?

*test
https://developers.facebook.com/tools/debug/sharing/

for forbidden error you need to check apache error_log it sounds like mod_security rule issue.