Redis 5

Hello @disturbed-pixel,

Thank you for your inquiry and I am happy to answer. Redis 5.0.2 has some deprecations.
We have an issue in our public Repo in Github about this https://github.com/W3EDGE/w3-total-cache/issues/29
A workaround, until this is fixed, is to replace line 155 in /wp-content/plugins/w3-total-cache/Cache_Redis.php

return $accessor->delete( $storage_key );
with this:
return $accessor->del( $storage_key );

Thank you for your patience.