After upgrade from 3.1.2 to 3.1.6 server trows a 404 not found. when trying to access http://serverip/folder. The folder is under /var/www/html/ Isp status page gives me this warning Inst libgd3 [2.1.0-5+deb8u10] (2.1.0-5+deb8u11 Debian-Security:8/oldstable [amd64]) Conf libgd3 (2.1.0-5+deb8u11 Debian-Security:8/oldstable [amd64])