The crash logs say the following

Failed to load mods: The given sprite rectangle (left_top=274x0, right_bottom=548x284) is outside the actual sprite size (left_top=0x0, right_bottom=274x568).
See the log file for more information.: water-pumpjack/graphics/remnants/water-pumpjack-remnants.png

Mods to be disabled:
• water-pumpjack (2.4.0)

i dont think it is caused by Fulgoran enemies

It could be an incompatibility caused by an update (both your mod and Water Pumpjack updated a few hours ago) but the mod works without Fulgoran Enemies, and only crashes with Fulgoran Enemies enabled. I can try and send you more detailed logs or photos if you'd like.

Oh small correction: Water Pumpjack wasn't updated, I was confusing it with another mod. Yesterday I played with both mods active with no problem, and the crash only began happening after the update to Fulgoran Enemies.

I can confirm that this problem did not exist with v0.1.1 of the Fulgoran enemies mod. So I suspect it somehow got introduced with v0.1.2.

For now there is a workaround available (water pumpjack 2.4.1), but the root cause remains unknown.

@MFerrari

Can you please look at the changes between v0.1.1 and v0.1.2 of your mod and check if there is anything that can potentially impact of how the lua method "make_rotated_animation_variations_from_sheet" handles graphics (this is how remnant graphics are defined for base game entities and the water pumpjack mod as well), or generally speaking: anything that could potentially alter graphics handling for other mods or on a global level?

Ok, thats probably the issue.. I'm releasing a new version soon renaming that funcion and making it local. Thanks