minecraft 1.16.5
forge 36.2.39
Hwyla-forge-1.10.11-B78_1.16.2

[Worker-ResourceReload-1/ERROR]: Exception caught during firing event: mcp.mobius.waila.api.IRegistrar.addComponent(Lmcp/mobius/waila/api/IEntityComponentProvider;Lmcp/mobius/waila/api/TooltipPosition;Ljava/lang/Class;)V
Index: 1
Listeners:
0: NORMAL
1: net.minecraftforge.eventbus.EventBus$$Lambda$2634/1996111320@f1bd0c7
java.lang.NoSuchMethodError: mcp.mobius.waila.api.IRegistrar.addComponent(Lmcp/mobius/waila/api/IEntityComponentProvider;Lmcp/mobius/waila/api/TooltipPosition;Ljava/lang/Class;)V
at Tavi007.ElementalCombat.interaction.CombatPropertiesWailaPlugin.register(CombatPropertiesWailaPlugin.java:18)
at mcp.mobius.waila.Waila.lambda$null$3(Waila.java:86)
at java.lang.Iterable.forEach(Unknown Source)
at mcp.mobius.waila.Waila.lambda$loadComplete$4(Waila.java:78)
at java.util.ArrayList.forEach(Unknown Source)
at mcp.mobius.waila.Waila.loadComplete(Waila.java:77)
at net.minecraftforge.eventbus.EventBus.doCastFilter(EventBus.java:247)
at net.minecraftforge.eventbus.EventBus.lambda$addListener$11(EventBus.java:239)
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302)
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283)
at net.minecraftforge.fml.javafmlmod.FMLModContainer.acceptEvent(FMLModContainer.java:106)
at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:107)
at java.util.concurrent.CompletableFuture$AsyncRun.run(Unknown Source)
at java.util.concurrent.CompletableFuture$AsyncRun.exec(Unknown Source)
at java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(Unknown Source)
at java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
at java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

[11:57:32] [Worker-ResourceReload-1/ERROR]: Caught exception during event FMLLoadCompleteEvent dispatch for modid waila
java.lang.NoSuchMethodError: mcp.mobius.waila.api.IRegistrar.addComponent(Lmcp/mobius/waila/api/IEntityComponentProvider;Lmcp/mobius/waila/api/TooltipPosition;Ljava/lang/Class;)V
at Tavi007.ElementalCombat.interaction.CombatPropertiesWailaPlugin.register(CombatPropertiesWailaPlugin.java:18) ~[elementalcombat:1.16.5-1.2.0.4]
at mcp.mobius.waila.Waila.lambda$null$3(Waila.java:86) ~[waila:1.10.11-B78_1.16.2]
at java.lang.Iterable.forEach(Unknown Source) ~[?:1.8.0_333]
at mcp.mobius.waila.Waila.lambda$loadComplete$4(Waila.java:78) ~[waila:1.10.11-B78_1.16.2]
at java.util.ArrayList.forEach(Unknown Source) ~[?:1.8.0_333]
at mcp.mobius.waila.Waila.loadComplete(Waila.java:77) ~[waila:1.10.11-B78_1.16.2]
at net.minecraftforge.eventbus.EventBus.doCastFilter(EventBus.java:247) ~[eventbus-4.0.0.jar:?]
at net.minecraftforge.eventbus.EventBus.lambda$addListener$11(EventBus.java:239) ~[eventbus-4.0.0.jar:?]
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302) ~[eventbus-4.0.0.jar:?]
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283) ~[eventbus-4.0.0.jar:?]
at net.minecraftforge.fml.javafmlmod.FMLModContainer.acceptEvent(FMLModContainer.java:106) ~[forge:36.2]
at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:107) ~[forge:?]
at java.util.concurrent.CompletableFuture$AsyncRun.run(Unknown Source) [?:1.8.0_333]
at java.util.concurrent.CompletableFuture$AsyncRun.exec(Unknown Source) [?:1.8.0_333]
at java.util.concurrent.ForkJoinTask.doExec(Unknown Source) [?:1.8.0_333]
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(Unknown Source) [?:1.8.0_333]
at java.util.concurrent.ForkJoinPool.runWorker(Unknown Source) [?:1.8.0_333]
at java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source) [?:1.8.0_333]

I didn't know wthit before, crash only with the waila.
Now I"m using wthit, It works normally.
Thank you !

Hey. Thanks for the crash report. Could you please also provide the waila/wthit version that you used? I myself used the following version when I wrote the 1.16 version of the mod:
version_waila=1.10.11-B78_1.16.2
version_wthit=2.10.14