Hi!
No problem. Fortunately the process is very quick and easy. I think the cache folder is getting full and unable to continue to build.
When you try to build lighting, in your system tray you’ll get a little yellow and black “S” icon, that’s the swarm agent. Double click that and it should open the swarm agent. Then all you need to do is click the toolbar at the top called “Cache” - there you will see “clean” and “validate”.
I chose to hit both of these a few times just to make sure it properly worked. Then you should get your rendering abilities back. Also, in settings there is a “MaximumCacheSize” option. I can only assume that is related to the cache folder size. By default it is set to “10” i dont know if thats MBs or GBs but i just increased that to 1000. That seemed to prevent me from having to clean the cache as frequently.
Hope that helps