Server crashed with mods, help!

---- Minecraft Crash Report ---- // Everything's going to plan. No, really, that was supposed to happen. Time: 7/14/20 9:33 PM Description: Exception in server tick loop java.util.ConcurrentModificationException: null at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909) ~[?:1.8.0_222] {} at java.util.ArrayList$Itr.next(ArrayList.java:859) ~[?:1.8.0_222] {} at thedarkcolour.futuremc.config.option.CategoryOption.sync(CategoryOption.kt:14) ~[?:1.15.2-1.0.1] {re:classloading} at thedarkcolour.futuremc.config.Holder.sync(Holder.kt:17) ~[?:1.15.2-1.0.1] {re:classloading} at thedarkcolour.futuremc.FutureMC$1.invoke(FutureMC.kt:25) ~[?:1.15.2-1.0.1] {re:classloading} at thedarkcolour.futuremc.FutureMC$1.invoke(FutureMC.kt:18) ~[?:1.15.2-1.0.1] {re:classloading} at thedarkcolour.futuremc.FutureMC$sam$java_util_function_Consumer$0.accept(FutureMC.kt) ~[?:1.15.2-1.0.1] {re:classloading} at thedarkcolour.kotlinforforge.eventbus.KotlinEventBus$addListener$1.invoke(KotlinEventBus.kt:186) ~[?:?] {re:classloading} at thedarkcolour.kotlinforforge.eventbus.KotlinEventBus.post(KotlinEventBus.kt:376) ~[?:?] {re:classloading} at thedarkcolour.kotlinforforge.KotlinModContainer.dispatchConfigEvent(KotlinModContainer.kt:142) ~[?:1.3.1] {re:classloading} at net.minecraftforge.fml.config.ModConfig.fireEvent(ModConfig.java:89) ~[?:?] {re:classloading} at net.minecraftforge.fml.config.ConfigTracker.openConfig(ConfigTracker.java:106) ~[?:?] {re:classloading} at net.minecraftforge.fml.config.ConfigTracker.lambda$loadConfigs$1(ConfigTracker.java:83) ~[?:?] {re:classloading} at java.lang.Iterable.forEach(Iterable.java:75) ~[?:1.8.0_222] {} at java.util.Collections$SynchronizedCollection.forEach(Collections.java:2064) ~[?:1.8.0_222] {} at net.minecraftforge.fml.config.ConfigTracker.loadConfigs(ConfigTracker.java:83) ~[?:?] {re:classloading} at net.minecraftforge.fml.ModLoader.loadMods(ModLoader.java:154) ~[?:?] {re:classloading} at net.minecraftforge.fml.server.ServerModLoader.begin(ServerModLoader.java:46) ~[?:?] {re:classloading} at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:122) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:613) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222] {} A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- System Details -- Details: Minecraft Version: 1.15.2 Minecraft Version ID: 1.15.2 Operating System: Linux (amd64) version 4.4.0-169-generic Java Version: 1.8.0_222, Oracle Corporation Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 699426752 bytes (667 MB) / 1257242624 bytes (1199 MB) up to 1677721600 bytes (1600 MB) CPUs: 2 JVM Flags: 3 total; -XX:MaxMetaspaceSize=200M -Xmx1800M -Xms900M ModLauncher: 5.1.0+69+master.79f13f7 ModLauncher launch target: fmlserver ModLauncher naming: srg ModLauncher services: /eventbus-2.2.0-service.jar eventbus PLUGINSERVICE /forge.jar object_holder_definalize PLUGINSERVICE /forge.jar runtime_enum_extender PLUGINSERVICE /accesstransformers-2.1.3-shadowed.jar accesstransformer PLUGINSERVICE /forge.jar capability_inject_definalize PLUGINSERVICE /forge.jar runtimedistcleaner PLUGINSERVICE /forge.jar fml TRANSFORMATIONSERVICE FML: 31.2 Forge: net.minecraftforge:31.2.31 FML Language Providers: [email protected] minecraft@1 [email protected] Mod List: forge-1.15.2-31.2.31-server.jar Minecraft {[email protected] COMMON_SETUP} EndReborn [0.6.0].jar End: Reborn {[email protected] COMMON_SETUP} vanillahammers-1.15.2-2.1.jar Vanilla Hammers {[email protected] COMMON_SETUP} elevatorid-1.15.2-1.7.1.jar Elevator Mod {[email protected] COMMON_SETUP} AmbientSounds_v3.0.20_mc1.15.2.jar Ambient Sounds {[email protected] COMMON_SETUP} morevanillalib-1.15.2-1.2.2.jar MoreVanillaLib {[email protected] COMMON_SETUP} BiomesOPlenty-1.15.2-10.0.0.366-universal.jar Biomes O' Plenty {[email protected] COMMON_SETUP} MekanismTools-1.15.2-9.10.9.422.jar Mekanism: Tools {[email protected] COMMON_SETUP} furniture-7.0.0-pre16-1.15.1.jar MrCrayfish's Furniture Mod {[email protected] COMMON_SETUP} Morpheus-1.15.2-4.2.50.jar Morpheus {morpheus@version COMMON_SETUP} MekanismGenerators-1.15.2-9.10.9.422.jar Mekanism: Generators {[email protected] COMMON_SETUP} Hwyla-forge-1.10.8-B72_1.15.2.jar Waila {waila@version COMMON_SETUP} jei-1.15.2-6.0.2.12.jar Just Enough Items {[email protected] COMMON_SETUP} forbidden_arcanus-1.15.2-1.4.jar Forbidden & Arcanus {[email protected] COMMON_SETUP} futuremc-1.15.2-1.0.1.jar Future MC {[email protected] COMMON_SETUP} Mekanism-1.15.2-9.10.9.422.jar Mekanism {[email protected] COMMON_SETUP} caelus-FORGE-1.15.2-2.0-beta3.jar Caelus API {[email protected] COMMON_SETUP} forge-1.15.2-31.2.31-universal.jar Forge {[email protected] COMMON_SETUP} colytra-FORGE-1.15.2-3.0.jar Colytra {[email protected] COMMON_SETUP} gravestone-1.17.5.jar Gravestone Mod {[email protected] COMMON_SETUP} journeymap-1.15.2-5.7.0b3.jar Journeymap {[email protected] COMMON_SETUP} AutoRegLib-1.5-40.jar AutoRegLib {[email protected] COMMON_SETUP} Quark-r2.1-245.jar Quark {[email protected] COMMON_SETUP} Data Packs: Is Modded: Definitely; Server brand changed to 'forge' Type: Dedicated Server (map_server.txt)

I do not know how to solve it, please help it is the first time I publish here, so if you need more information you can help me pointing out how to share more details if you do not understand my problem

Quote from Eduargo

---- Minecraft Crash Report ---- // Todo va a planear. No, realmente, se suponía que eso iba a pasar. Hora: 14/7/20 9:33 PM Descripción: Excepción en el bucle de tick del servidor java.util.ConcurrentModificationException: nulo en java.util.ArrayList $ Itr.checkForComodification (ArrayList.java:909) ~ [?: 1.8.0_222] {} en java.util.ArrayList $ Itr.next (ArrayList.java:859) ~ [?: 1.8.0_222] {} en thedarkcolour.futuremc.config.option.CategoryOption.sync (CategoryOption.kt: 14) ~ [ ?: 1.15.2-1.0.1] {re: classloading} en thedarkcolour.futuremc.config.Holder.sync (Holder.kt: 17) ~ [?: 1.15.2-1.0.1] {re: classloading} en thedarkcolour.futuremc.FutureMC $ 1.invoke (FutureMC.kt: 25) ~ [?: 1.15.2-1.0.1] {re: classloading} en thedarkcolour.futuremc.FutureMC $ 1.invoke (FutureMC.kt: 18) ~ [ ?: 1.15.2-1.0.1] {re: classloading} en thedarkcolour.futuremc. -------------------------------------------------- ------------------------------------- - Detalles del sistema - Detalles: Versión de Minecraft: 1.15. 2 ID de versión de Minecraft: 1.15.2 Sistema operativo: Linux (amd64) versión 4.4.0-169-versión genérica de Java: 1.8.0_222, Oracle Corporation Java VM Versión: OpenJDK 64-Bit Server VM (modo mixto), Oracle Corporation Memory : 699426752 bytes (667 MB) / 1257242624 bytes (1199 MB) hasta 1677721600 bytes (1600 MB) CPU: 2 indicadores JVM: 3 en total; -XX: MaxMetaspaceSize = 200M -Xmx1800M -Xms900M ModLauncher: 5.1.0 + 69 + master.79f13f7 Objetivo de lanzamiento de ModLauncher: fmlserver Nombre de ModLauncher: srg Servicios de ModLauncher: /eventbus-2.2.0-service.jar eventbus PLUGINSERVICE /forgedeal object_holder_holder_deport_finder_project_holder PLUGINSERVICE /forge.jar runtime_enum_extender PLUGINSERVICE /accesstransformers-2.1.3- sombreado. jar Caelus API {[email protected] COMMON_SETUP} forge-1.15.2-31.2.31-universal.jar Forge {[email protected] COMMON_SETUP} colytra-FORGE-1.15.2-3.0.jar Colytra {[email protected] COMMON_SETUP} gravestone-1.17.5.jar Gravestone Mod {[email protected] COMMON_SETUP} journeymap-1.15.2-5.7.0b3.jar Journeymap {[email protected] COMMON_SETUP} AutoRegLib-1.5-40.jar AutoRegLib {[email protected] COMMON_SETUP} Quark-r2.1-245.jar Quark {[email protected] COMMON_SETUP} Paquetes de datos: Modificado: Definitivamente; La marca del servidor cambió a 'forjar' Tipo: Servidor dedicado (map_server.txt) 5 COMMON_SETUP} journeymap-1.15.2-5.7.0b3.jar Journeymap {[email protected] COMMON_SETUP} AutoRegLib-1.5-40.jar AutoRegLib {[email protected] COMMON_SETUP} Quark-r2.1-245.jar Quark { [email protected] COMMON_SETUP} Paquetes de datos: está modificado: definitivamente; La marca del servidor cambió a 'forjar' Tipo: Servidor dedicado (map_server.txt) 5 COMMON_SETUP} journeymap-1.15.2-5.7.0b3.jar Journeymap {[email protected] COMMON_SETUP} AutoRegLib-1.5-40.jar AutoRegLib {[email protected] COMMON_SETUP} Quark-r2.1-245.jar Quark { [email protected] COMMON_SETUP} Paquetes de datos: está modificado: definitivamente; La marca del servidor cambió a 'forjar' Tipo: Servidor dedicado (map_server.txt)

No sé cómo resolverlo, por favor ayuda es la primera vez que publico aquí, así que si necesitas más información puedes ayudarme a señalar cómo compartir más detalles si usted no entiende mi problema