I finally was able to set the surround up with success. With a little bit more research, people or households with mesh network (more than one access points) have a more difficult time setting up the said speakers set up because of network communication issues and it’s configuration. With that said, I know it is a bit extra to be buying Sonos Boost, but it is what solved my issue with setting up the Two Arc+ Two One SLs surround. You would know you are on the right track to success because upon reading the reviews of Sonos Boost, people who bough it commonly share the same experience on encountering the surround set up error because of their mesh network set up. Some would also mention a few alternatives in lieu of using Sonos Boost- like hooking up one of the speakers (i.e Arc) through ethernet cable so that Arc could act like a wifi hotspot for remaining speakers. I have not tried that one and am not sure if that is even accurate. But long story short, if you have the same Surround Setup error issue like mine, buy a Sonos Boost and you'll be fine.