k2-steel-pipes/prototypes/steel-pump/entity.lua:2909: attempt to index field 'pump' (a nil value)
stack traceback:
k2-steel-pipes/prototypes/steel-pump/entity.lua:2909: in main chunk
[C]: in function 'require'
k2-steel-pipes/prototypes/steel-pump/index.lua:8: in main chunk
[C]: in function 'require'
k2-steel-pipes/data.lua:14: in main chunk

This Error come form this mod.

What other mods do you have installed? Looks like a mod you're playing with removed the "pumps" category.

It's likely the Colony Builder mod. It makes several changes to base game properties. I've been hunting through its files trying to fix similar compatibility issues.