It probably from the new mobs or optifine messes it, I don't know but here the crash log.
crash-2021-12-09_14.29.12-client.txt

Its the same crash i have already fixed yesterday. As i see from crash report you are using 2.1.1 version of SolarCraft, the latest is 2.1.2.

I added 2.1.2 but i guess something did has gone wrong when adding it

Sorry for opening a ticket for a dumb thing

Thank you

Actually found the issue why its on 2.1.1. when i changed to 2.1.2. the Curseforge app wants update it to 2.1.1. So I have clicked the update button without noticing it downgraded the version.