Error when reloading resources. Randomly and may relate to other mods

[SettingDust]

[19:28:56] [Render thread/ERROR] (rrls) Caught error loading resourcepacks!
java.util.concurrent.CompletionException: java.lang.NullPointerException: Cannot invoke "net.minecraft.entity.LivingEntity.getEquippedStack(net.minecraft.entity.EquipmentSlot)" because "entity" is null
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315) ~[?:?]
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320) ~[?:?]
	at java.util.concurrent.CompletableFuture$UniRun.tryFire(CompletableFuture.java:791) ~[?:?]
	at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
	at net.minecraft.resource.SimpleResourceReload.method_18365(SimpleResourceReload.java:69) ~[client-intermediary.jar:?]
	at net.minecraft.util.thread.ThreadExecutor.executeTask(ThreadExecutor.java:156) ~[client-intermediary.jar:?]
	at net.minecraft.util.thread.ReentrantThreadExecutor.executeTask(ReentrantThreadExecutor.java:23) ~[client-intermediary.jar:?]
	at net.minecraft.util.thread.ThreadExecutor.runTask(ThreadExecutor.java:130) ~[client-intermediary.jar:?]
	at net.minecraft.util.thread.ThreadExecutor.runTasks(ThreadExecutor.java:115) ~[client-intermediary.jar:?]
	at net.minecraft.client.MinecraftClient.render(MinecraftClient.java:1175) ~[client-intermediary.jar:?]
	at net.minecraft.client.MinecraftClient.run(MinecraftClient.java:802) ~[client-intermediary.jar:?]
	at net.minecraft.client.main.Main.main(Main.java:250) ~[minecraft-1.20.1-client.jar:?]
	at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470) ~[fabric-loader-0.15.3.jar:?]
	at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.15.3.jar:?]
	at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.15.3.jar:?]
	at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:87) ~[NewLaunch.jar:?]
	at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129) ~[NewLaunch.jar:?]
	at org.prismlauncher.EntryPoint.main(EntryPoint.java:70) ~[NewLaunch.jar:?]
Caused by: java.lang.NullPointerException: Cannot invoke "net.minecraft.entity.LivingEntity.getEquippedStack(net.minecraft.entity.EquipmentSlot)" because "entity" is null
	at com.majruszsdifficulty.itemsets.ItemSetRequirement.check(ItemSetRequirement.java:23) ~[majruszs-difficulty-fabric-1.20.1-1.9.6.jar:?]
	at com.majruszsdifficulty.itemsets.ItemSet.lambda$findRequirementsMet$0(ItemSet.java:63) ~[majruszs-difficulty-fabric-1.20.1-1.9.6.jar:?]
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:178) ~[?:?]
	at java.util.AbstractList$RandomAccessSpliterator.forEachRemaining(AbstractList.java:720) ~[?:?]
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575) ~[?:?]
	at java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260) ~[?:?]
	at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616) ~[?:?]
	at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622) ~[?:?]
	at java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627) ~[?:?]
	at com.majruszsdifficulty.itemsets.ItemSet.findRequirementsMet(ItemSet.java:63) ~[majruszs-difficulty-fabric-1.20.1-1.9.6.jar:?]
	at com.majruszsdifficulty.itemsets.ItemSet.canTrigger(ItemSet.java:59) ~[majruszs-difficulty-fabric-1.20.1-1.9.6.jar:?]
	at com.majruszsdifficulty.itemsets.UndeadSet.lambda$static$3(UndeadSet.java:33) ~[majruszs-difficulty-fabric-1.20.1-1.9.6.jar:?]
	at com.majruszlibrary.events.base.Condition.check(Condition.java:99) ~[majrusz-library-fabric-1.20.1-7.0.3.jar:?]
	at com.majruszlibrary.events.base.Event.accept(Event.java:44) ~[majrusz-library-fabric-1.20.1-7.0.3.jar:?]
	at com.majruszlibrary.events.base.Events.accept(Events.java:61) ~[majrusz-library-fabric-1.20.1-7.0.3.jar:?]
	at com.majruszlibrary.events.base.Events.dispatch(Events.java:20) ~[majrusz-library-fabric-1.20.1-7.0.3.jar:?]
	at com.majruszsdifficulty.items.SoulJar.getMultiplier(SoulJar.java:122) ~[majruszs-difficulty-fabric-1.20.1-1.9.6.jar:?]
	at com.majruszsdifficulty.items.SoulJar$Client.addTooltip(SoulJar.java:268) ~[majruszs-difficulty-fabric-1.20.1-1.9.6.jar:?]
	at com.majruszlibrary.events.base.Event.accept(Event.java:49) ~[majrusz-library-fabric-1.20.1-7.0.3.jar:?]
	at com.majruszlibrary.events.base.Events.accept(Events.java:61) ~[majrusz-library-fabric-1.20.1-7.0.3.jar:?]
	at com.majruszlibrary.events.base.Events.dispatch(Events.java:20) ~[majrusz-library-fabric-1.20.1-7.0.3.jar:?]
	at net.minecraft.item.ItemStack.localvar$dci000$majruszlibrary$getTooltipLines(ItemStack.java:19636) ~[client-intermediary.jar:?]
	at net.minecraft.item.ItemStack.getTooltip(ItemStack.java:749) ~[client-intermediary.jar:?]
	at net.minecraft.client.MinecraftClient.method_1591(MinecraftClient.java:850) ~[client-intermediary.jar:?]
	at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:273) ~[?:?]
	at java.util.Collections$2.tryAdvance(Collections.java:4853) ~[?:?]
	at java.util.Collections$2.forEachRemaining(Collections.java:4861) ~[?:?]
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?]
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?]
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?]
	at net.minecraft.client.search.TextSearcher.of(TextSearcher.java:20) ~[client-intermediary.jar:?]
	at net.minecraft.client.search.TextSearchProvider.reload(TextSearchProvider.java:26) ~[client-intermediary.jar:?]
	at net.minecraft.client.search.SearchManager$Instance.reload(SearchManager.java:65) ~[client-intermediary.jar:?]
	at net.minecraft.client.search.SearchManager.reload(SearchManager.java:25) ~[client-intermediary.jar:?]
	at net.minecraft.resource.SynchronousResourceReloader.method_29490(SynchronousResourceReloader.java:15) ~[client-intermediary.jar:?]
	at java.util.concurrent.CompletableFuture$UniRun.tryFire(CompletableFuture.java:787) ~[?:?]
	... 15 more