I had tested the mod on Nauvis a couple hours ago. It had placed lots of lamps as intended, but since it hammered UPS on my big base, I left it alone for later.

The error here https://imgur.com/gallery/lamp-mod-crash-on-2-1-experimental-kjKeXxl was when I popped over to Fulgora to check on something. The mod was never used on Fulgora. It was actually the 2nd time I got that error, the first was on Nauvis. I uninstalled it for now, hope this error means something.

Did you by any chance zoom out very far before using Lamp Placer? The error seems to be because it tries to check for placing lamps at a position very very very far away which probably hasn't been generated.

I think that the fact that you switched over to Fulgora is just a coincidence.

Please confirm whether you zoomed out very far before using the mod, that would help me understand the issue.