LiteSpeed Cache (the WordPress plugin) has its own cache bindings and overwrites all caching methods. So the Redis cache WordPress plugin will not work as a result. You'll need to set the Redis connection settings in Litespeed Cache in this URL:
wp-admin/options-general.php?page=litespeedcache#advanced
There you can input your Redis info like IP, port, and authentication key. You can now disable the WP Redis Plugin .