Change the minetest.after call in technic.register_recipe to a direct register_recipe call to find out what mod is calling technic.register_recipe invalidly and report a bug with that mod.
I did this and found out that it is caused by glowdirt mod.
And the best is: I wrote this mod myself and someone already reported a bug with new versions of technic mod.
And even better: I already fixed that bug (with using a table for input), but I still used my old unfixed version myself.
So very stupid. xD
Ok, so you don't need to make changes I think. There shouldn't be much old mods which register recipes for technic machines.