It could be that some material or component name is causing the error to be reported, you can try splitting the file into multiple parts to troubleshoot the problem. 
Well, thank you very much. If possible, can we add the material and component names for positioning issues in the future to facilitate problem-solving?
I found a bug: If “Lightning Preset” is set to NULL, “Env/Background” is set to Color, then “Env/Strength” will reset it values to 0 very easily.