- Load fresh save with these mods.
- Use editor (or otherwise) to place a solar panel ghost.
- Copy (or cut) the solar panel ghost.
The type of solar panel ghost (Space Exploration has several modded solar panels) does not matter. Space Exploration being enabled apparently matters (to be precise, this doesn't happen in vanilla, but it might be related to one of the other mods). The panel being a ghost rather than an actual panel matters.
This crash is new as of 1.1.51, I cannot reproduce it in 1.1.50.