Not sure if this is a universal truth for all modded fuel, but the AAI Industry Processed Fuel causes an immediate crash when placed into an Ammo Loader+ box.

Addendum: It does not crash if you already have a bullet loader in place. I believe it is a priority issue in the code, it checks for the existence of an active bullet loader chest and crashes if there is not one prior to setting up a fuel loader chest.

Also does not return to crashing state if you remove the bullet loader after placing a fuel loader.

Thanks for letting me know about this!

I did notice while play testing that some nil values kept crawling into the fuel loader tables. I never did find out where they were coming from, I'm willing to bet it has to do with the crashes though.

I'll let you know once I found a solution!

I commented out line 869 in the file ammo-loader/lib/Force.lua and the problem seems to have disappeared, maybe it will help since there is only logging there

This should be fixed in version 2.0.3!