From crash-log:
---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 8/1/20 2:55 PM
Description: Rendering screen

java.lang.IllegalArgumentException: Cannot set property IntegerProperty{name=model, clazz=class java.lang.Integer, values=[0, 1, 2, 3]} to 4 on Block{projectvibrantjourneys:frogbit}, it is not an allowed value
at net.minecraft.state.StateHolder.func_206870_a(SourceFile:112) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at projectvibrantjourneys.common.blocks.FloatingPlantBlock.func_196258_a(FloatingPlantBlock.java:49) ~[?:1.15.2-2.0.1] {re:classloading}
at shadows.apotheosis.ench.EnchModuleClient.tooltips(EnchModuleClient.java:45) ~[?:3.2.4] {re:classloading}
at net.minecraftforge.eventbus.ASMEventHandler_967_EnchModuleClient_tooltips_ItemTooltipEvent.invoke(.dynamic) ~[?:?] {}
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:80) ~[eventbus-2.2.0-service.jar:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:258) ~[eventbus-2.2.0-service.jar:?] {}
at net.minecraftforge.event.ForgeEventFactory.onItemTooltip(ForgeEventFactory.java:267) ~[?:?] {re:mixin,re:classloading}
at net.minecraft.item.ItemStack.func_82840_a(ItemStack.java:678) ~[?:?] {re:mixin,re:classloading,xf:fml:apotheosis:apothitemusehook}
at net.minecraft.client.gui.screen.Screen.getTooltipFromItem(Screen.java:121) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:fml:blur:hookBackgroundColor,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.gui.screen.Screen.renderTooltip(Screen.java:116) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:fml:blur:hookBackgroundColor,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.gui.screen.inventory.ContainerScreen.func_191948_b(ContainerScreen.java:149) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.gui.screen.inventory.InventoryScreen.render(SourceFile:95) ~[?:?] {re:classloading,pl:accesstransformer:B}
at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:368) ~[?:?] {re:classloading}
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source) ~[?:?] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_251] {}
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_251] {}
at net.optifine.reflect.Reflector.callVoid(Reflector.java:742) ~[?:?] {re:classloading}
at net.minecraft.client.renderer.GameRenderer.func_195458_a(GameRenderer.java:798) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default}
at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:924) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:fml:codechickenlib:IItemRenderer,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:553) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:fml:codechickenlib:IItemRenderer,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(SourceFile:204) ~[1.15.2.jar:?] {re:classloading}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_251] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_251] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_251] {}
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_251] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) ~[forge-1.15.2-31.2.31.jar:31.2] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.1.0.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.1.0.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.1.0.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.1.0.jar:?] {re:classloading}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.1.0.jar:?] {re:classloading}

Similar crash when mousing over duckweed. Not my crash, but same pack.

message.txt

Similar crash when mousing over duckweed. Not my crash, but same pack.

message.txt

Agree. Same issue with duckweed, crashes game in 1.15.2.

I can confirm it's happening on both, and only for certain people. Here is a crash log.
https://gist.github.com/Ridanisaurus/a070a3ece36675b1b6106ec221f6f85d

Pls fix. ;)

crash-2020-09-27_15.02.13-client.txt

Just had the same :)

People are crashing on my server thanks to this. Bump.