Error establishing a Redis connection

OOM command not allowed when used memory > 'maxmemory'.

WordPress is unable to establish a connection to Redis. This means that the connection information in your wp-config.php file are incorrect, or that the Redis server is not reachable.

Is the correct Redis host and port set?
Is the Redis server running?

If you need help, please read the installation instructions.

To disable Redis, delete the object-cache.php file in the /wp-content/ directory.