Assuming you have .htaccess file in a target directory (if not, create one as shown below).
Solution: You need to change the directory permission to 755
cPanel way
FileZilla way
For more details on altering file/folder permission via FileZilla click here..
Specimen .htaccess file
If you want to create a fresh .htaccess file. You can use following script to paste into.
Order allow,deny
Allow from all
Require all granted