Hi Troy, hello NervKotz_Dev,
I ran into the same issue with the lighting build being stuck at 0%.
While searching for a solution, I found two different cases and I’m at the moment not 100% sure of a solution.
But everytime I deactivate the firewall it works, active firewall no lighting build. A few days ago, I was working on the train and being on a smartphone hotspot it seemed to work, but I’m not sure, if I had the firewall active at the time. I don’t know which part of the process gets block, but the solution can’t be to add 18(all Lightmass-programms) exceptions to the firewall.
Currently I’m using 5.3.2-29314046+++UE5+Release-5.3 on a M3 max.
My solution for the moment is to work with an inactive firewall, and I switch it on after the first lighting build. It seems to work then, but it falls back to build nothing after hibernation.