Tons of Problems with Dynamic Lighting

Dynamic lighting does not work at all for me. It is constantly creating problems-- sometimes players can't see anything, even when vision is turned on and they are carrying a light source. Sometimes players can see everything, the entire map, including enemy tokens I don't want seen. Is there anything I can do to get a more normalised experience from dynamic lighting? This is not worth a subscription as is.

I'm using the Descent into Avernus module purchased from Roll 20, and dynamic lighting isn't working on basically any map with the old system or the new system.