Minimwatch is greyed out on Mac Sequoia

[SpruceFan]

Simon,

I'm running Mac OS 15.0.1 on an iMac with a 3.8 Gz 8-Core Intel i7. When I download and install Minimwatch 2.2.r4e on startup I get the following message: "UPnP multicast group 239.255.255.250 is not accessible". Minimwatch then shuts down. The control panel does not show a switch to enable local network access for Minimwatch. I'm running Norton Internet Security, but if I shut it down there's no difference. Any ideas?

Thanks!