Okay, so I just added in Factorissimo, and found an issue that may actually be a conflict with Bob's Mods. I'm inside a Factorissimo Factory, and I place down a Steel Furnace, and it gives back an error that says its autofill calling for something to do with Bob's long handed burner inserter, which is no longer a thing as of the latest update in the last couple days. Remove Autofill, no problems. I also tried editing the configs for Bob's mods and nothing seems to work on that front. Basically -- the lines that handle inserters, but I really don't know Lua, just some basic knowledge on structuring for code. Definitely not an expert. Anyway, uninstalled and reinstalled, same issue with the fresh copy.

The problem is that the latest Bob's mods update removed the long handed burner inserters, as well as a few others, so every time autofill tries to call it throws an exception. Need to update autofill with latest bob's mods inserter parameters.

Either of these two options should fix Autofill if it ever gives problems
1 disabling and load/saving game then re enable Autofill.
2 console command /c remote.call("af","resetMod")

This was actually a problem with any mod change that removes an autofilled entity or fuel-type. I (think) I fixed the problem with fuel items being removed but forgot to fix the item/entity filling portion

On First install Autofill reads from a bunch of loader tables to populate default settings. If an item doesn't exist it is not added in. If a mod gets changed Autofill pre-.18 doesn't update these tables

Short Version is: Fixed in .18 with the start of some new features

Awesome, thanks!