Thanks for the reply. Using LiteSpeed Cache. There was an error in the Object Cache port setting that was configured to 11211 (Memcached) instead of 6379 (Redis), using the latter. That eliminated the PHP error protocol error, got ‘E’ as reply-type byte, and was replaced by Connection refused. Decided to turn OFF Object Cache. Still, getting Connection refused ¿?
I’m not real familiar with the LiteSpeed Cache plugin or Redis so you should post a forum topic on the LiteSpeed Cache plugin wordpress.org support forum area. I’m sure they are have come across this issue before and can give you a working solution.