Error while running the on_init: LuaSurface doesn't contain key freeze_daytime.
stack traceback:
Caves/control.lua:70: in function 'init_globals'
Caves/control.lua:75: in function <Caves/control.lua:74>

runing only this mod

it seems like freeze_daytime was changed from a function to a property in 0.15.13, could it be that your version is below that?
if so, updating factorio would fix that.
i didn't realize the api changed; i will have to change the mod info so that it requires the right version
(i am currently running 0.15.26)

Developer recently found bug in Caves 0.1.4. Info at:

https://www.reddit.com/r/factorio/comments/6pgaqu/ore_deposits_disappearing_help_required/

I think the "{e.area, type= "resource"}" bug was causing some stuttering as well, changing it to "{area = e.area, type= "resource"}" seems to result in a smoother game. Makes sense since it doesn't have to scan the entire surface each time anymore.

thanks for pointing that bug out, i fixed it in 0.1.5