The mod Factorissimo2 Playthrough (1.1.3) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Factorissimo2-Playthrough::on_gui_opened (ID 85)
Factorissimo2-Playthrough/scripts/gui.lua:6: attempt to compare number with table
stack traceback:
Factorissimo2-Playthrough/scripts/gui.lua:6: in function 'create_buttons'
Factorissimo2-Playthrough/scripts/gui.lua:85: in function 'create_interface'
Factorissimo2-Playthrough/scripts/gui.lua:208: in function 'toggle_interface'
Factorissimo2-Playthrough/scripts/gui.lua:221: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>

Thanks for the report. I need some further information, however.
Did you have any other mods active? What did you do right before this happened (steps to reproduce)? Did you have any research unlocked?

Yeah I tried an old save game before the update and that is what the problem was. I got it working again on a new save. Thanks. I do have this bundled with Electric Furnaces, Far Reach, Faster Start, FNEI, and Squeak Through. I have Automation, Logistics, Electronics, Fast Inserter, Green Science researched.