i made a server and played on it for a few hours with some friends and then i stoped the server when i tried to start it, it didnt restart
Logs
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[10Sep2021 17:25:54.556] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--gameDir, ., --launchTarget, fmlserver, --fml.forgeVersion, 36.2.0, --fml.mcpVersion, 20210115.111550, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge, nogui]
[10Sep2021 17:25:54.559] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 8.0.9+86+master.3cf110c starting: java version 1.8.0_302 by Temurin
[10Sep2021 17:25:54.775] [main/INFO] [net.minecraftforge.fml.loading.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[10Sep2021 17:25:54.802] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.2 Source=file:/C:/Users/waltr/Desktop/server%2054/libraries/org/spongepowered/mixin/0.8.2/mixin-0.8.2.jar Service=ModLauncher Env=SERVER
[10Sep2021 17:25:55.580] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmlserver' with arguments [--gameDir, ., nogui]
[10Sep2021 17:25:59.672] [modloading-worker-11/INFO] [net.minecraftforge.common.ForgeMod/FORGEMOD]: Forge mod loading, version 36.2.0, for MC 1.16.5 with MCP 20210115.111550
[10Sep2021 17:25:59.674] [modloading-worker-11/INFO] [net.minecraftforge.common.MinecraftForge/FORGE]: MinecraftForge v36.2.0 Initialized
[10Sep2021 17:25:59.949] [Forge Version Check/INFO] [net.minecraftforge.fml.VersionChecker/]: [forge] Starting version check at https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json
[10Sep2021 17:26:01.074] [main/INFO] [com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService/]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
[10Sep2021 17:26:01.204] [Forge Version Check/INFO] [net.minecraftforge.fml.VersionChecker/]: [forge] Found status: UP_TO_DATE Current: 36.2.0 Target: null
[10Sep2021 17:26:01.469] [main/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
[10Sep2021 17:26:01.472] [main/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[10Sep2021 17:26:01.474] [main/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
[10Sep2021 17:26:01.475] [main/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
[10Sep2021 17:26:01.477] [main/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[10Sep2021 17:26:01.487] [main/INFO] [net.minecraft.resources.SimpleReloadableResourceManager/]: Reloading ResourceManager: Default, ar_datapack, forge-1.16.5-36.2.0-universal.jar
[10Sep2021 17:26:02.034] [Worker-Main-14/INFO] [net.minecraft.item.crafting.RecipeManager/]: Loaded 7 recipes
[10Sep2021 17:26:02.457] [Worker-Main-14/INFO] [net.minecraft.advancements.AdvancementList/]: Loaded 927 advancements
[10Sep2021 17:26:02.893] [main/WARN] [net.minecraftforge.common.ForgeHooks/]: Detected missing vanilla dimensions from the world!
[10Sep2021 17:26:02.924] [main/ERROR] [net.minecraft.world.storage.SaveFormat/]: Exception reading .\world\level.dat
java.lang.IllegalStateException: Not a JSON Object: null
at com.google.gson.JsonElement.getAsJsonObject(JsonElement.java:90) ~[server-1.16.5-20210115.111550-extra.jar:?]
at net.minecraft.util.registry.WorldSettingsImport$IResourceAccess$1.func_241879_a(WorldSettingsImport.java:193) ~[?:?]
at net.minecraft.util.registry.WorldSettingsImport.func_241805_a_(WorldSettingsImport.java:131) ~[?:?]
at net.minecraft.util.registry.WorldSettingsImport.func_240885_a_(WorldSettingsImport.java:105) ~[?:?]
at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[?:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[?:?]
at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[?:?]
at net.minecraft.util.registry.WorldSettingsImport.func_241797_a_(WorldSettingsImport.java:104) ~[?:?]
at net.minecraft.util.registry.SimpleRegistryCodec.func_240862_a_(SourceFile:35) ~[?:?]
at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[?:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[?:?]
at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[?:?]
at net.minecraft.util.registry.SimpleRegistryCodec.decode(SourceFile:35) ~[?:?]
at com.mojang.serialization.Decoder$2.decode(Decoder.java:63) ~[?:?]
at com.mojang.serialization.Codec$2.decode(Codec.java:71) ~[?:?]
at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[?:?]
at net.minecraftforge.common.ForgeHooks.lambda$null$10(ForgeHooks.java:1393) ~[forge:?]
at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[?:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[?:?]
at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[?:?]
at net.minecraftforge.common.ForgeHooks.lambda$fixUpDimensionsData$13(ForgeHooks.java:1393) ~[forge:?]
at com.mojang.datafixers.util.Either$Left.mapBoth(Either.java:33) ~[?:?]
at com.mojang.serialization.DataResult.map(DataResult.java:110) ~[?:?]
at net.minecraftforge.common.ForgeHooks.fixUpDimensionsData(ForgeHooks.java:1365) ~[forge:?]
at net.minecraft.world.storage.SaveFormat.func_237259_a_(SaveFormat.java:98) ~[?:?]
at net.minecraft.world.storage.SaveFormat.lambda$getReader$4(SaveFormat.java:197) ~[?:?]
at net.minecraft.world.storage.SaveFormat.func_237266_a_(SaveFormat.java:158) ~[?:?]
at net.minecraft.world.storage.SaveFormat.func_237263_a_(SaveFormat.java:63) ~[?:?]
at net.minecraft.world.storage.SaveFormat$LevelSave.func_237284_a_(SaveFormat.java:324) ~[?:?]
at net.minecraft.server.Main.main(Main.java:139) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_302]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_302]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_302]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_302]
at net.minecraftforge.fml.loading.FMLServerLaunchProvider.lambda$launchService$0(FMLServerLaunchProvider.java:51) ~[forge.jar:36.2]
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?]
at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63) [forge.jar:?]
at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60) [forge.jar:?]
at net.minecraftforge.server.ServerMain.main(ServerMain.java:57) [forge.jar:?]
[10Sep2021 17:26:02.929] [main/WARN] [net.minecraftforge.common.ForgeHooks/]: Detected missing vanilla dimensions from the world!
[10Sep2021 17:26:02.941] [main/ERROR] [net.minecraft.world.storage.SaveFormat/]: Exception reading .\world\level.dat_old
java.lang.IllegalStateException: Not a JSON Object: null
at com.google.gson.JsonElement.getAsJsonObject(JsonElement.java:90) ~[server-1.16.5-20210115.111550-extra.jar:?]
at net.minecraft.util.registry.WorldSettingsImport$IResourceAccess$1.func_241879_a(WorldSettingsImport.java:193) ~[?:?]
at net.minecraft.util.registry.WorldSettingsImport.func_241805_a_(WorldSettingsImport.java:131) ~[?:?]
at net.minecraft.util.registry.WorldSettingsImport.func_240885_a_(WorldSettingsImport.java:105) ~[?:?]
at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[?:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[?:?]
at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[?:?]
at net.minecraft.util.registry.WorldSettingsImport.func_241797_a_(WorldSettingsImport.java:104) ~[?:?]
at net.minecraft.util.registry.SimpleRegistryCodec.func_240862_a_(SourceFile:35) ~[?:?]
at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[?:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[?:?]
at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[?:?]
at net.minecraft.util.registry.SimpleRegistryCodec.decode(SourceFile:35) ~[?:?]
at com.mojang.serialization.Decoder$2.decode(Decoder.java:63) ~[?:?]
at com.mojang.serialization.Codec$2.decode(Codec.java:71) ~[?:?]
at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[?:?]
at net.minecraftforge.common.ForgeHooks.lambda$null$10(ForgeHooks.java:1393) ~[forge:?]
at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[?:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[?:?]
at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[?:?]
at net.minecraftforge.common.ForgeHooks.lambda$fixUpDimensionsData$13(ForgeHooks.java:1393) ~[forge:?]
at com.mojang.datafixers.util.Either$Left.mapBoth(Either.java:33) ~[?:?]
at com.mojang.serialization.DataResult.map(DataResult.java:110) ~[?:?]
at net.minecraftforge.common.ForgeHooks.fixUpDimensionsData(ForgeHooks.java:1365) ~[forge:?]
at net.minecraft.world.storage.SaveFormat.func_237259_a_(SaveFormat.java:98) ~[?:?]
at net.minecraft.world.storage.SaveFormat.lambda$getReader$4(SaveFormat.java:197) ~[?:?]
at net.minecraft.world.storage.SaveFormat.func_237266_a_(SaveFormat.java:165) ~[?:?]
at net.minecraft.world.storage.SaveFormat.func_237263_a_(SaveFormat.java:63) ~[?:?]
at net.minecraft.world.storage.SaveFormat$LevelSave.func_237284_a_(SaveFormat.java:324) ~[?:?]
at net.minecraft.server.Main.main(Main.java:139) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_302]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_302]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_302]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_302]
at net.minecraftforge.fml.loading.FMLServerLaunchProvider.lambda$launchService$0(FMLServerLaunchProvider.java:51) ~[forge.jar:36.2]
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?]
at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63) [forge.jar:?]
at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60) [forge.jar:?]
at net.minecraftforge.server.ServerMain.main(ServerMain.java:57) [forge.jar:?]
[10Sep2021 17:26:02.953] [main/FATAL] [net.minecraft.server.Main/]: Failed to start the minecraft server
java.lang.IllegalStateException: Not a JSON Object: null
at com.google.gson.JsonElement.getAsJsonObject(JsonElement.java:90) ~[server-1.16.5-20210115.111550-extra.jar:?]
at net.minecraft.util.registry.WorldSettingsImport$IResourceAccess$1.func_241879_a(WorldSettingsImport.java:193) ~[?:?]
at net.minecraft.util.registry.WorldSettingsImport.func_241805_a_(WorldSettingsImport.java:131) ~[?:?]
at net.minecraft.util.registry.WorldSettingsImport.func_240885_a_(WorldSettingsImport.java:105) ~[?:?]
at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[?:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[?:?]
at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[?:?]
at net.minecraft.util.registry.WorldSettingsImport.func_241797_a_(WorldSettingsImport.java:104) ~[?:?]
at net.minecraft.util.registry.SimpleRegistryCodec.func_240862_a_(SourceFile:35) ~[?:?]
at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[?:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[?:?]
at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[?:?]
at net.minecraft.util.registry.SimpleRegistryCodec.decode(SourceFile:35) ~[?:?]
at com.mojang.serialization.Decoder$2.decode(Decoder.java:63) ~[?:?]
at com.mojang.serialization.Codec$2.decode(Codec.java:71) ~[?:?]
at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[?:?]
at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29) ~[?:?]
at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[?:?]
at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$5.decode(RecordCodecBuilder.java:324) ~[?:?]
at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[?:?]
at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52) ~[?:?]
at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[?:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[?:?]
at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[?:?]
at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[?:?]
at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[?:?]
at com.mojang.serialization.Decoder$1.decode(Decoder.java:49) ~[?:?]
at com.mojang.serialization.Codec$2.decode(Codec.java:71) ~[?:?]
at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[?:?]
at net.minecraft.server.Main.lambda$main$0(Main.java:153) ~[?:?]
at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[?:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[?:?]
at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[?:?]
at net.minecraft.server.Main.main(Main.java:153) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_302]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_302]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_302]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_302]
at net.minecraftforge.fml.loading.FMLServerLaunchProvider.lambda$launchService$0(FMLServerLaunchProvider.java:51) ~[forge.jar:36.2]
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?]
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?]
at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63) [forge.jar:?]
at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60) [forge.jar:?]
at net.minecraftforge.server.ServerMain.main(ServerMain.java:57) [forge.jar:?]