[mothered]

generally speaking, if you're getting a 403, you're doing something that you're not supposed to and the client code isn't even receiving your requests (server software filter).

Precisely.

Moreover, It can also be a WAF blocking requests.

my friend is getting this error!
* Forbidden: You do not have permission to access this directory on this server

If permissions have been set server-side/back-end, unless you have access to alter/modify the permissions, you cannot do anything solely from a client-side standpoint.