UE4 Linux can't build lighting

[anonymous_user_2abc45731 (anonymous_user_2abc4573)]

@Joel Graff;323240

It appears (at least in my case), this has to do with the firewall in Linux Mint. I disabled the firewall and lighting built immediately. I found the answer here:

https://answers.unrealengine.com/questions/231706/linux-lighting-wont-build.html

It suggests unblocking UDP 6666 in the firewall (which I haven’t tried) as the best solution.

Disabling the firewall requires some terminal work. Specifically,

sudo ufw disable

disables it. It will not re-enable on it’s own (even after rebooting). Use

sudo ufw enable

to do that.

Ah, I have tried that too. But now it doesn’t work offline. (It does online now.)
Does yours work offline!?