Yo, I am trying to fire up a Planet Tiber start run using the Any Planet Start mod, as I am not seeing any others that do the same/similar.

Gonna be making a post on the Any Planet Start page as well to get as much info as I can, but wanted to send one here as well.

When I go to Mod Settings I see a 'tiber' as an option, but after setting that as my starting planet I get the following on game restart:

Failed to load mods: any-planet_start/data-updates.lua:37: attempt to index field '?' (a nil value)
stack traceback:
any-planet-start/data-updates.lua:37: in main chunk

It specifically states that any-planet-start is the mod causing the problem and when I disable it or reset its settings (NOT using Tiber as the starting planet like I want to) the game launches fine.

Are there any other mods out there that I can use to get this result? Or is it something you've seen before with trying to get a Tiber start going?

I added Tiber to the Any Planet Start menu with version 2.0.3 back in November 2024. When Any Planet Start updated internal data structures to support custom planet starts in their 1.1.0 version in December 2024, I did not notice and did not update Factorio and Conquer: Tiberian Dawn to use the new method for adding Tiber to their menu.
It's an issue on my mod and I'll fix it for version 2.0.14 but if you want to start on Tiber before 2.0.14 comes out, your options are to revert to Any Planet Start version 1.0.5 or to disable Any Planet Start and instead use our mod setting "Tiberium Initially Spawns On: Start on Tiber"