I genuinely have no idea what happened here:
Failed to load mods: galore_lib/lib/tech.lua:23: bad argument #1 of 3 to 'insert' (table expected, got nil)
stack traceback:
[C]: in function 'insert'
galore_lib/lib/tech.lua:23: in function 'add_productivity_change'
galore_lib/lib/vgal.lua:307: in function 'extend'
space_age_galore/prototypes/intermediates/space.lua:1: in main chunk
[C]: in function 'require'
space_age_galore/data.lua:21: in main chunk

Will be fixed in the newest version of GaloreLib (Will be updated later today.)

Thanks for the bugreport :D

(Also thanks to the Muluna dev for helping with fixing it! The error was "caused" by planetlib - although its more a result of my naive code..)