Hi Jeff, what is your system? emonPi or self install? Has it ever worked? if so, what has changed, an update to PHP for instance?
This is my goto thread on redis - there are actually 3 components installed and enabled. Beware, the install has changed since that thread!!!
You can see how REDIS is currently installed here EmonScripts/redis.sh at master · openenergymonitor/EmonScripts · GitHub