Ran into this today when setting up my first laser - bogged me down a good bit. ChatGPT got me past it by suggesting to open my full home subnet to private networking for all apps. Worked for me (run this in Terminal, if you decide it is ok for your machine security, replacing my example subnet with your proper one):
sudo defaults write com.apple.network.local-network AllowedEthernetLocalNetworkAddresses -array “192.168.1.0/24”
sudo defaults write com.apple.network.local-network AllowedWiFiLocalNetworkAddresses -array “192.168.1.0/24”