Failed to initialize object cache

Hi,

When I look at the server error logs, I can see the following coming up every time:

Got error ‘PHP message: objectcache.critical: Failed to initialize object cache: The WP_REDIS_CONFIG constant has not been defined. If it was defined, try moving it closer to the beginning of the wp-config.php file. For more information see: https://objectcache.pro/docs/configuration/; PHP message: objectcache.warning: Failing over to in-memory object cache’

In the WP dashboard, it shows the Redis Object Cache as Connected, and the drop-in is valid.

Thanks.