There is a problem with the bzgas mod on startup.
This is my error message:
Error while running setup for entity prototype "basic-chemical-plant" (assembling-machine): next_upgrade target (chemical-plant) must have the same fast_replaceable_group (assembling-machine != chemical-plant).

The quickfix for this now will be to edit dependencies in info.json
tin and gas was made after this mod and is not compatible.

edit dependencies to:
"dependencies": ["base",
"bz-dsr-bridge",
"bzaluminum",
"bzcarbon",
"bzfoundry",
"bzlead",
"bzsilicon",
"bztitanium",
"bztungsten",
"bzzirconium",
"Krastorio2",
"islands_world",
"? Flow Control",
"? underground-pipe-pack"]