You must enable the PECL memcached or memcache extension to use memcache.inc. cpanel
Solutions
yum install ea4-experimental yum install ea-php56-php-memcache yum install ea-php56-php-memcached yum install ea-memcached That should fix the issue. i have tried it and fixed my issue. Reference https://forums.cpanel.net/threads/installing-memcache-and-memcached-with-easyapache4.566261/