https://ibmimedia.com/blog/47/solve-403-forbidden-permission-error-in-xampp-server
Below are some tips to fix 403 Forbidden permission error;
i. To fix this apache error , add it in your virtual host config. Add this lines to httpd-vhosts.conf file:
<Directory "c:/<path-to-projects>/">
Options Indexes FollowSymLinks MultiViews
AllowOverride all
Order Deny,Allow
Allow from all
Require all granted
</Directory>
ii. For XAMPP on Mac, simply execute the following command;
sudo chmod -R 0777 /Applications/XAMPP/htdocs/projectname
NOTE: Remember to change 'projectname' to your actual project name. Also, make sure the project is on the root directory of htdocs or change the path accordingly.
For more detailed solution, go to https://ibmimedia.com/blog/47/solve-403-forbidden-permission-error-in-xampp-server