For 1.16.5, when Unique Enchantments is used with Enchantment Machine (url: https://www.curseforge.com/minecraft/mc-mods/enchantment-machine), the game crashes if the enchanter is used (for instance enchanting a book). Additionally, any books that were put into the enchanting 'library' are erased.

UE was found to be the culprit by a process of elimnation. The crash log lies.

crash-2022-06-09_21.42.04-fml.txt
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are you sure that's the right file?
that tells me you don't have crafttweaker installed
also pls use pastebin or similar for logs

Here's the correct crashlog: https://pastebin.com/PXSnVfz8

@AuroraHydroid UE isn't even mentioned in the log and anything we change would trigger UE to be in the logs.

I'm not sure why it isn't showing in the logs, and that's why this is a frustrating issue.
Here is a crash log with only UE and EM enabled. UE is the only thing that is causing it to crash. If it's not possible to find it on this end, I'll see if EM can find anything.

https://pastebin.com/sq3sNRrr

Yeah found the bug. It is within enchantment machine.
https://github.com/Cheaterpaul/EnchantmentMachine/blob/1.18/src/main/java/de/cheaterpaul/enchantmentmachine/client/gui/screens/inventory/EnchanterScreen.java#L140

Basically what the bug is. Enchantment machine expects the "Color" of the Name to be not null. UE adds icons which are not colored (null) which enchantment machine doesn't account for and crashes.

Yes this is a UE caused, but the bug is not within UE because minecraft clearly defines that "Colors" can be null and the dev didn't account for that.

Opened issue with Enchanting machine since its their bug.

Thank you very much for your time! I appreciate the expertise.

@AuroraHydroid fix should be out from his side.