Issue with iris and ftb quests fabric 1.20.1

Whenever i tried to join a singleplayer world with after adding ftb quests in my custom modpack i got this message (see first image) after a bit i discovered that it had something to do with shaders (See second image) that image was from the log and so i removed iris and it works fine now with ftb quests. Anyone got any idea how i can fix this? Because i love to play with shaders but i also want to play with ftb quests
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