Crash log:

Caused by: java.lang.NoSuchMethodError: 'java.lang.String net.minecraft.class_1867.method_8112()' at me.steven.indrev.recipes.PatchouliBookRecipe$Companion$Serializer.read(PatchouliBookRecipe.java:26) ~[indrev-0.3.0-BETA.jar:?] at me.steven.indrev.recipes.PatchouliBookRecipe$Companion$Serializer.read(PatchouliBookRecipe.java:21) ~[indrev-0.3.0-BETA.jar:?] at net.minecraft.recipe.RecipeManager.deserialize(RecipeManager:123) ~[?:?] at net.minecraft.recipe.RecipeManager.apply(RecipeManager:54) ~[?:?] at net.minecraft.recipe.RecipeManager.apply(RecipeManager:35) ~[?:?] at net.minecraft.resource.SinglePreparationResourceReloadListener.method_18790(SinglePreparationResourceReloadListener:13) ~[?:?] at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:714) ~[?:?] at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) ~[?:?] at net.minecraft.resource.ResourceReloader.method_18365(ResourceReloader:71) ~[?:?] at net.minecraft.resource.ResourceReloader.method_18367(ResourceReloader:70) ~[?:?] at java.util.concurrent.CompletableFuture$UniCompletion.claim(CompletableFuture.java:568) ~[?:?] at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:710) ~[?:?]

I noticed this with another mod implementing Patchouli books as well, so it could be a problem there.

Oh, that's my bad, I already know the issue and it's a quick fix. I will reply here again as soon as the fixed version is available on curseforge. Sorry about that

Fixed version is now available here. I'm very sorry about this problem. Hope you enjoy the mod!