Lighting builds used to take about 10 - 20 minutes under UE4 version 17, and now they are taking a day to a week (per level) to build in version 25. What is happening, and how do I fix it?
I already found and fixed the swarm server not being in standalone mode (clicked on the swarm server icon and set standalone to true, per a prior post), and that seems to help, but light builds are still taking about a day, even in preview mode.