What is happening
When you try to load Charset Optics and John Smith Legacy - Modded, you will get the following crash:
https://pastebin.com/8zt6nFJ5

Does this happen without OptiFine?

Let me test it (right now i'm bloated with exams, sorry if i take too much)

I guess you come from this comment in Curseforge right?
https://www.curseforge.com/minecraft/mc-mods/charset-optics?comment=5

Well, that texture pack has some lightmaps that only work with Optifine (a reason for any user to not use the texture pack without Optifine), but no problem, as i said above, it is fixed by removing the torch texture, anyways i will test it, it is a minor issue after all (and i don't use the texturepack commonly, basically an edge case)