This is the error message:

Error in assignID: item with name 'yeet-ske_heb_248' does not exist.

Source: ske_rubia_tech (technology).

First, please confirm your mods are updated.

That tech ID and item ID do not exist in the current version of Rubia. Furthermore, I do not name technologies with underscores like that. This bug likely comes from the code in the Shattered Planet mod. Please report this bug to CPU_blackheart.

I just checked Rubia v0.69.136 with Shattered planet v1.0.40. Both work together. This is still an issue with a technology from the Shattered Planet mod side, but you may need to update your mods.

Odd...
I'm using the most recent version of Shattered planet v1.0.40 and my game is still crashing.
I'll go check with CPU_blackheart via a new thread.
Thanks, appreciate.

I'm not sure if this helps you, but when I tested, I had ONLY Rubia and Shattered planet (and there dependents) enabled. The "ske_rubia_tech" does exist, and it does have a valid item ID target for "yeet-ske_heb_248". It sounds to me like you might have another mod installed that deletes "ske_heb_248" or "yeet-ske_heb_248" (since Rubia auto-generates the yeet item based on items and technologies that exist).

CPU_Blackheart is aware, but is primarily working on Vesta. You may want to reach out to him via the Foundry discord if you want more help with this.

Good luck and godspeed.