So, people have reported that using your mod with mine crashes on start up. Their forge version was 2768, and here's the crash report that they provided:
https://pastebin.com/yL52REXw
While I may be able to prevent this crash, it would almost certainly break the mod for the player. Any idea why this is happening?

AS isn't in the trace, so unsure what it may be.

Cause that error implies the player doesn't have a UUID in mojang's database.

Yeah I didn't see it either, but apparently removing AS stopped the crash.
Does AS modify anything huge about the player?
On a side note, we're going to be reworking how player data is saved for 1.13, so that might help.

Mojang provided. It's why the mod doesn't work with cracked accounts.

Any mod that has a fakeplayer is going to have conflicts, then, since they are used for player simulators, right clicking blocks, etc.

Uuid, or mojang provided uuid? Lots of mods provide a fake uuid for their fakeplayer entity.

Huh.

Not an AS issue and we don't provide support for cracked.
Buy the game.

Oh it's a cracked error?
I don't think it is :P
Since it doesn't happen with Astral Sorcery AND Avatar installed.
More information according to the player:
"Hey, instead of deleting the mod, remove dimension 0 from WeakSkyRender in the Astral Sorcery, that fixed the issue for real."

That has zero influence or even interaction with the crash you provided. That just prevents the sky shader from being populated.

Red herring and unrelated.

Ok.
Yes, I realize that, I was just wondering if it might've helped you at all.
Yeah I think if AS is creating a fake player, then the mod is probably trying to use that fake player, and straight up crashes. I can fix that, if that's the issue.

AS doesn't directly but it does interact with players and block certain accesses.

Ok I'll add a fix for that- it might break bending, but at least it shouldn't crash.

Theoretically fixed on my side