Pelagos doesn't work with Quality Seeds mod. It displays the message "Failed to load mods: Error while running setup for entity prototype "coconut-palm-greenhouse" (assembling-machine): At least one of 'required_tiles' or 'colliding_tiles' must be set."

I was able to fix this with

if mods["quality-seeds"] then
table.insert(quality_seeds.ignore_plants, "coconut-palm")
end

The error lies in quality-seeds greenhouse implementation, not in Pelagos planet mod.
I will ask quality-seeds author to fix it

https://mods.factorio.com/mod/quality-seeds/discussion/68b477ccf4ddfddb328786ab

here is related discussion tab

Yeah, I merely proposed a temporary bandaid while it is fixed

temporarly added coconut palm to ignore_plants until miguel fix quality seeds
should load fine in 0.7.6