Removing redis (5:4.0.9-1ubuntu0.1) ...
Removing redis-server (5:4.0.9-1ubuntu0.1) ...
Failed to stop redis-server.service: Unit redis-server.service not loaded.
invoke-rc.d: initscript redis-server, action "stop" failed.
dpkg: error processing package redis-server (--remove):
 installed redis-server package pre-removal script subprocess returned error exit status 1