Failed to load mods: SpidertronEnhancements/prototypes/dummy-spidertron.lua:26: attempt to index local 'graphics_set' (a nil value)
stack traceback:
SpidertronEnhancements/prototypes/dummy-spidertron.lua:26: in function 'adjust_graphics_set'
SpidertronEnhancements/prototypes/dummy-spidertron.lua:94: in function 'create_dummy_spidertron'
SpidertronEnhancements/prototypes/dummy-spidertron.lua:122: in main chunk
[C]: in function 'require'
SpidertronEnhancements/data-updates.lua:1: in main chunk

Thanks for the report! Technically this is a bug in Spidertron Enhancements, but my mod is doing something that might be unexpected. Should be fixed in the newest release :)