In that case, I need steps to reproduce the crash on my end in order to report and troubleshoot your issue.
Since the new projects build their lighting just fine, then we can rule out it being an engine issue and more of a project specific one.
Perhaps some context as to how large your scene is, what types of lights you are using, and any other pertinent information that will help me reproduce the crash on my end is going to be helpful.
Let me know if you have further questions.
Thanks,