Hi Ankayn,
THIS IS NOT A BUG! Is a, normal, Factorio, behaviour. Factorio developers have choice, for probably performance purpose (we will never know) that the game can't load more than 255 tiles, as said our error message, u need to disable one or more mods. U add SE, so u little rascal (I'm joking eh), don't have list Alien biomes (is a dependency of SE), that is the really issue here, the Earendel tiles mod is beautiful but pratically alone full the number of tiles available, u have this choise, remove:
- Alien biomes (then Space exploration)
- Dectorio (much tiles)
- Factorissimo (not much tile but some)
- K2 (5 tiles)
I think remove one of them will solve the problem, there isn't another way to solve the problem (unfortunately).