A 403 error is an error displayed when the page or directory you are trying to display has incorrect access permissions.
Could you please confirm the following points?
- Check if permissions are set properly
- If you edit the .htaccess settings, undo
If you can't find any problems with the above two, the WAF may have blocked access and an error has occurred.
Disabling the WAF may solve the problem, so please try it once.