I dont know that switch but if you login and look for the multicast settings, make sure that something like igmp sniffing or treat multicast as broadcast is enabled. Or try a basic unmanaged switch if these are the instructions to enable multicast. Certainly not home user friendly (not that i suspect home use is the market the switch is designed for) which is why swapping out for a reliable unmanaged switch is imho the safest option.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).