Basically I had 3 mods on and it crashes but works fine if i only have the 2 but from what I can understand is loading priority?
These are the mods I had:
space-age (2.0.76)
Factorissimo-2-notnotmelon (3.11.19)
space-age-machine-tiers (0.06)
dimension-warp (0.6.0)
And what it says after I load into the game:
"Failed to load mods: Error while running setup for entity prototype "rocket-silo" (rocket-silo): next_upgrade target (space-age-machine-tiers-rocket-silo-2) must have the same collision mask."