Modpack version
Enigmatica 6 v0.5.6

Describe the bug
Using optifine for v1.16.5 (specifcally OptiFine_1.16.5_HD_U_G8.jar), using any shaders causes it to crash with the following exception:

Description: Rendering overlay

net.minecraftforge.fml.ModLoadingException: Immersive Engineering (immersiveengineering) encountered an error during the done event phase
§7java.lang.ArrayIndexOutOfBoundsException: null
	at net.minecraftforge.fml.javafmlmod.FMLModContainer.acceptEvent(FMLModContainer.java:124) ~[?:36.1] {re:classloading}
	...

I tried a few different shaders including Complementary Shaders (https://www.curseforge.com/minecraft/customization/complementary-shaders), SEUS, and Sildurs Shaders.

I have experienced this both while running on my Macbook and my Windows PC.

Logs
https://pastebin.com/hAdS8q21

Screenshots
N/A

We don't actually provide support for using Optifine - it is closed source and basically impossible to troubleshoot.

We would, however, suggest also adding Optiforge, and coming to our discord for further support - there are users running shaders successfully that may be able to offer advice.

We use the issue tracker exclusively for bug reports, development and feature requests. However, this issue appears to be a support request. Please use the support channel on our Discord to get help.