How do I Fix the Object Cache Test Failed Issue?

Sometimes a system upgrade may cause the config file to be updated. The first thing you can do is to check user permissions.

For Memcached:

vi /etc/memcached.conf  

Verify -u www-data.

For Redis:

vi /lib/systemd/system/redis-server.service

Verify Group=www-data.

Category: OpenLiteSpeed