Bug Report

How can the crash be reproduced?

Start server with biomes o plenty in the mods folder

Crash Report and Logs

[ ---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 6/1/19 3:51 PM
Description: Exception in server tick loop

net.minecraftforge.fml.LoadingFailedException: null
at net.minecraftforge.fml.ModLoader.dispatchAndHandleError(ModLoader.java:157) ~[?:?] {pl:eventbus:A,pl:object_holder_definalize:A,pl:runtime_enum_extender:A,pl:capability_inject_definalize:A,pl:runtimedistcleaner:A}
at net.minecraftforge.fml.ModLoader.loadMods(ModLoader.java:137) ~[?:?] {pl:eventbus:A,pl:object_holder_definalize:A,pl:runtime_enum_extender:A,pl:capability_inject_definalize:A,pl:runtimedistcleaner:A}
at net.minecraftforge.fml.server.ServerModLoader.begin(ServerModLoader.java:44) ~[?:?] {pl:eventbus:A,pl:object_holder_definalize:A,pl:runtime_enum_extender:A,pl:capability_inject_definalize:A,pl:runtimedistcleaner:A}
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:116) ~[?:?] {pl:accesstransformer:B,pl:object_holder_definalize:A,pl:runtime_enum_extender:A,pl:capability_inject_definalize:A,pl:runtimedistcleaner:A}
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:549) [?:?] {pl:accesstransformer:B,pl:object_holder_definalize:A,pl:runtime_enum_extender:A,pl:capability_inject_definalize:A,pl:runtimedistcleaner:A}
at java.lang.Thread.run(Unknown Source) [?:1.8.0_202] {}

A detailed walkthrough of the error, its code path and all known details is as follows:

-- System Details --
Details:
Minecraft Version: 1.13.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_202, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 18011344632 bytes (17176 MB) / 20580401152 bytes (19627 MB) up to 20580401152 bytes (19627 MB)
JVM Flags: 2 total; -Xmx20G -Xms20G
FML: New FML!
Loaded coremods (and transformers): Nothing
Profiler Position: N/A (disabled)
Data Packs:
Is Modded: Definitely; Server brand changed to 'forge'
Type: Dedicated Server (map_server.txt)]

Mod Version

BiomesOPlenty-1.13.2-8.0.0.136-universal

Minecraft Version

1.13.2