1.
If you have the possiblity and your server is a linux server, you can change the permissions with something like
sudo chmod -R 777 /var/www/folder
Or completely change the owner with
sudo chown -R user /var/www/folder
2.
Look into the apache configuration files and also the
.htaccess, if the directory is blocked by
Deny from all
Or simply not allowed. You could allow the directory by creating a .htaccess file and enter
<Directory yourdirectory>
Order allow,deny
Allow from all
</Directory>
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