One of errors and force closed log. This happen randomly multiple times with same errors, "Caused by: java.nio.file.AccessDeniedException".

crash-2020-05-01_09.47.46-servert.xt

---- Minecraft Crash Report ----
// But it works on my machine.

Time: 5/1/20 9:47 AM
Description: Exception in server tick loop

com.electronwill.nightconfig.core.io.WritingException: An I/O error occured
	at com.electronwill.nightconfig.core.io.ConfigWriter.write(ConfigWriter.java:90) ~[core-3.6.2.jar:?] {}
	at com.electronwill.nightconfig.core.file.WriteSyncFileConfig.save(WriteSyncFileConfig.java:61) ~[core-3.6.2.jar:?] {}
	at com.electronwill.nightconfig.core.file.AutosaveCommentedFileConfig.save(AutosaveCommentedFileConfig.java:80) ~[core-3.6.2.jar:?] {}
	at net.minecraftforge.fml.config.ModConfig.save(ModConfig.java:93) ~[?:?] {re:classloading}
	at net.minecraftforge.fml.config.ConfigTracker.openConfig(ConfigTracker.java:102) ~[?:?] {re:classloading}
	at net.minecraftforge.fml.config.ConfigTracker.lambda$loadConfigs$1(ConfigTracker.java:83) ~[?:?] {re:classloading}
	at java.lang.Iterable.forEach(Iterable.java:75) ~[?:1.8.0_242] {}
	at java.util.Collections$SynchronizedCollection.forEach(Collections.java:2064) ~[?:1.8.0_242] {}
	at net.minecraftforge.fml.config.ConfigTracker.loadConfigs(ConfigTracker.java:83) ~[?:?] {re:classloading}
	at net.minecraftforge.fml.server.ServerLifecycleHooks.handleServerAboutToStart(ServerLifecycleHooks.java:82) ~[?:?] {re:classloading}
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:203) ~[?:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:613) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242] {}
Caused by: java.nio.file.AccessDeniedException: ./BiomeOplentyNewWorld/serverconfig/usefulbackpacks-server.toml
	at sun.nio.fs.UnixException.translateToIOException(UnixException.java:84) ~[?:1.8.0_242] {}
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102) ~[?:1.8.0_242] {}
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107) ~[?:1.8.0_242] {}
	at sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:214) ~[?:1.8.0_242] {}
	at java.nio.file.spi.FileSystemProvider.newOutputStream(FileSystemProvider.java:434) ~[?:1.8.0_242] {}
	at java.nio.file.Files.newOutputStream(Files.java:216) ~[?:1.8.0_242] {}
	at com.electronwill.nightconfig.core.io.ConfigWriter.write(ConfigWriter.java:87) ~[core-3.6.2.jar:?] {}
	... 12 more


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 4.14.173-137.229.amzn2.x86_64
	Java Version: 1.8.0_242, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 3507529288 bytes (3345 MB) / 3958898688 bytes (3775 MB) up to 3958898688 bytes (3775 MB)
	CPUs: 2
	JVM Flags: 2 total; -Xms4000M -Xmx4000M
	ModLauncher: 5.0.0-milestone.4+67+b1a340b
	ModLauncher launch target: fmlserver
	ModLauncher naming: srg
	ModLauncher services: 
		/eventbus-2.0.0-milestone.1-service.jar eventbus PLUGINSERVICE 
		/forge-1.15.2-31.1.48.jar object_holder_definalize PLUGINSERVICE 
		/forge-1.15.2-31.1.48.jar runtime_enum_extender PLUGINSERVICE 
		/accesstransformers-2.0.4-shadowed.jar accesstransformer PLUGINSERVICE 
		/forge-1.15.2-31.1.48.jar capability_inject_definalize PLUGINSERVICE 
		/forge-1.15.2-31.1.48.jar runtimedistcleaner PLUGINSERVICE 
		/forge-1.15.2-31.1.48.jar fml TRANSFORMATIONSERVICE 
		/MixinBootstrap-1.0.3.jar mixinbootstrap TRANSFORMATIONSERVICE 
		/MixinBootstrap-1.0.3.jar mixin PLUGINSERVICE 
		/MixinBootstrap-1.0.3.jar mixinbootstrap PLUGINSERVICE 
	FML: 31.1
	Forge: net.minecraftforge:31.1.48
	FML Language Providers: 
		javafml@31.1
		minecraft@1
	Mod List: 
		Cucumber-1.15.2-3.0.5.jar Cucumber Library {cucumber@3.0.5 DONE}
		NetherPortalFix_1.15.2-6.0.0.jar NetherPortalFix {netherportalfix@6.0.0 DONE}
		zombiehs_1.15.2-2.1.2.jar Zombie Horse Spawn {zombiehs@2.1.2 DONE}
		nethercraft-1.15.2-1.0.7.jar Nethercraft {nethercraft@1.0.7 DONE}
		petnames_1.15.2-1.0.jar Pet Names {petnames@1.0 DONE}
		giantspawn_1.15.2-1.0.2.jar Giant Spawn {giantspawn@1.0.2 DONE}
		vilnames_1.15-2.0.jar Villager Names {vilnames@2.0 DONE}
		jei-1.15.2-6.0.0.3.jar Just Enough Items {jei@6.0.0.3 DONE}
		buzzierbees-1.4.jar Buzzier Bees {buzzierbees@1.4 DONE}
		DoggyTalents-1.15.2-1.15.2.3.jar Doggy Talents {doggytalents@1.15.2.3 DONE}
		paperbooks_1.15.2-1.0.jar Paper Books {paperbooks@1.0 DONE}
		goblintraders-1.2.0-1.15.2.jar Goblin Traders {goblintraders@1.2.0 DONE}
		skeletonhs_1.15.2-1.1.2.jar Skeleton Horse Spawn {skeletonhs@1.1.2 DONE}
		fablibrary-1.15.2-1.1.jar FAB Library {fablibrary@1.1 DONE}
		Clumps-5.0.2.jar Clumps {clumps@5.0.2 DONE}
		journeymap-1.15.2-5.7.0beta1.jar Journeymap {journeymap@1.15.2-5.7.0beta1 DONE}
		CookingForBlockheads_1.15.2-8.0.1.jar Cooking for Blockheads {cookingforblockheads@8.0.1 DONE}
		Placebo-1.15.2-3.0.2.jar Placebo {placebo@3.0.2 DONE}
		citadel-1.1.4.jar Citadel {citadel@1.1.4 DONE}
		FruitTrees-1.15.2-1.1.6.jar Fruit Trees {fruittrees@1.1.6 DONE}
		WitherSkeletonTweaks-1.15.1-4.0.0.jar Wither Skeleton Tweaks {wstweaks@4.0.0 DONE}
		Bookshelf-1.15.2-5.4.14.jar Bookshelf {bookshelf@5.4.14 DONE}
		snowundertrees-1.15.1-v1.0.jar Snow Under Trees {snowundertrees@v1.0 DONE}
		bottleyourxp_1.15-1.1.jar Bottle Your Xp {bottleyourxp@1.1 DONE}
		u_team_core-1.15.2-2.11.0.156.jar U Team Core {uteamcore@2.11.0.156 DONE}
		randompatches-1.15.2-1.21.1.2.jar RandomPatches {randompatches@1.15.2-1.21.1.2 DONE}
		grassseeds_1.15.2-1.1.jar Grass Seeds {grassseeds@1.1 DONE}
		nhacampfire_1.15-2.1.jar No Hostiles Around Campfire {nhacampfire@2.1 DONE}
		DarkUtilities-1.15.2-3.0.3.jar Dark Utilities {darkutils@3.0.3 DONE}
		Morpheus-1.15.2-4.2.50.jar Morpheus {morpheus@version DONE}
		softsnowfallmod-mc1.15-v1.0.jar Soft Snow Fall Mod {softsnowfallmod@1.0.0 DONE}
		Hwyla-forge-1.10.8-B72_1.15.2.jar Waila {waila@version DONE}
		SnowRealMagic-1.15.2-1.7.5.jar Snow! Real Magic! {snowrealmagic@1.7.5 DONE}
		Kiwi-1.15.2-2.6.5.jar Kiwi {kiwi@2.6.5 DONE}
		dismounte_1.15-1.1.jar Dismount Entity {dismountentity@1.1 DONE}
		moveminecarts_1.15.2-1.2.jar Move Minecarts {moveminecarts@1.2 DONE}
		campfiretorches-1.15.2-1.0.2.jar Campfire Torches {campfiretorches@1.15.2-1.0.2 DONE}
		forge-1.15.2-31.1.48-universal.jar Forge {forge@31.1.48 DONE}
		Waddles-1.15.2-0.8.6.jar Waddles {waddles@1.15.2-0.8.6 DONE}
		nmdar_1.15.2-3.8.jar Named Areas {nmdar@3.8 DONE}
		simpleores-1.15.2-2.1.3.1.jar Simple Ores {simpleores@1.15.2-2.1.3.1 DONE}
		weakerspwbs_1.15-1.3.jar Weaker Spiderwebs {weakerspwbs@1.3 DONE}
		MysticalAgriculture-1.15.2-3.0.2.jar Mystical Agriculture {mysticalagriculture@3.0.2 DONE}
		ironchest-1.15.2-10.0.3.jar Iron Chests {ironchest@1.15.2-10.0.1 DONE}
		villagerdeathm_1.15.2-1.2.jar Villager Death Messages {villagerdeathm@1.2 DONE}
		forge-1.15.2-31.1.48-server.jar Minecraft {minecraft@1.15.2 DONE}
		mcw-bridges-1.0.4fix-mc1.15.2.jar Macaw's Bridges {mcwbridges@1.0.4 DONE}
		useful_backpacks-1.15.2-1.9.4.63.jar Useful Backpacks {usefulbackpacks@1.9.4.63 DONE}
		torchmaster-2.1.1-rc0.jar Torchmaster {torchmaster@2.1.1-rc0 DONE}
		swingthroughgrass-1.15.2-1.4.0.jar SwingThroughGrass {swingthroughgrass@1.15.2-1.4.0 DONE}
		bspawncontrol_1.15.2-1.0.jar Better Spawner Control {bspawncontrol@1.0 DONE}
		nutrmilk_1.15-1.1.jar Nutritious Milk {nutrmilk@1.1 DONE}
		extractpoison_1.15.2-1.0.jar Extract Poison {extractpoison@1.0 DONE}
		BiomesOPlenty-1.15.2-10.0.0.345-universal.jar Biomes O' Plenty {biomesoplenty@1.15.2-10.0.0.342 DONE}
		invtotem_1.15.2-1.0.jar Inventory Totem {invtotem@1.0 DONE}
		grindst_1.15.2-1.2.jar Grindstone Sharper Tools {grindst@1.2 DONE}
		simplefarming-1.15.2-1.2.7.jar Simple Farming {simplefarming@1.15.2-1.2.7 DONE}
		moveboats_1.15.2-1.1.jar Move Boats {moveboats@1.1 DONE}
		MiscAdditions-1.2.3.jar Misc Additions {miscadditions@1.2.3 DONE}
		randomenchants-3.1.0.jar Random Enchants {randomenchants@3.1.0 DONE}
		curios-FORGE-1.15.2-2.0.2.2.jar Curios API {curios@FORGE-1.15.2-2.0.2.2 DONE}
		Botania r1.15-382.jar Botania {botania@r1.15-382 DONE}
		Patchouli-1.15.2-1.2-31.jar Patchouli {patchouli@1.15.2-1.2-30 DONE}
		AutoRegLib-1.5-40.jar AutoRegLib {autoreglib@1.5-40 DONE}
		Quark-r2.1-233.jar Quark {quark@r2.1-233 DONE}
		StorageDrawers-1.15.2-7.0.2.jar Storage Drawers {storagedrawers@1.15.2-7.0.1 DONE}
		OreExcavation-1.7.151.jar Ore Excavation {oreexcavation@NONE DONE}
		performant-1.15-2.08m.jar Performant {performant@2.08m DONE}
		additionalevents-1.1.jar Additional Events {additionalevents@1.1 DONE}
		PickleTweaks-1.15.2-4.0.2.jar Pickle Tweaks {pickletweaks@4.0.2 DONE}
		hunterillager-1.15.2-0.6.0.jar HunterIllager {hunterillager@0.5.0 DONE}
		AppleSkin-mc1.15.2-forge-1.0.13.jar AppleSkin {appleskin@1.0.13 DONE}
		AI-Improvements-1.15.2-0.3.0.jar AI-Improvements {aiimprovements@0.3.0 DONE}
		mcw-furniture-1.0.1-mc1.15.1 1.15.2.jar Macaw's Furnitures {mcwfurnitures@1.0.1 DONE}
		netherpspr_1.15-3.0.jar Nether Portal Spread {netherpspr@3.0 DONE}
		Aquaculture-1.15.2-2.0.13.jar Aquaculture 2 {aquaculture@1.15.2-2.0.13 DONE}
		snowbfrmobs_1.15.2-1.0.jar Snowballs Freeze Mobs {snowbfrmobs@1.0 DONE}
	Kiwi Modules: 
		fruittrees:fruittrees
		fruittrees:hybridization
		kiwi:contributors
		snowrealmagic:snowrealmagic
	Player Count: 0 / 20; []
	Data Packs: 
	Is Modded: Definitely; Server brand changed to 'forge'
	Type: Dedicated Server (map_server.txt)