crash report

---- Minecraft Crash Report ----
// I feel sad now :(

Time: 10/20/21, 8:18 PM
Description: Exception in server tick loop

java.lang.NullPointerException: Cannot invoke "com.google.gson.JsonArray.iterator()" because "☃" is null
	at net.minecraft.server.players.StoredUserList.m_11399_(SourceFile:121) ~[server-1.17.1-20210706.113038-srg.jar%2325!:?] {re:classloading}
	at net.minecraft.server.dedicated.DedicatedPlayerList.m_139596_(SourceFile:83) ~[server-1.17.1-20210706.113038-srg.jar%2325!:?] {re:classloading}
	at net.minecraft.server.dedicated.DedicatedPlayerList.<init>(SourceFile:22) ~[server-1.17.1-20210706.113038-srg.jar%2325!:?] {re:classloading}
	at net.minecraft.server.dedicated.DedicatedServer.m_7038_(DedicatedServer.java:169) ~[server-1.17.1-20210706.113038-srg.jar%2325!:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:659) ~[server-1.17.1-20210706.113038-srg.jar%2325!:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.m_177918_(MinecraftServer.java:258) ~[server-1.17.1-20210706.113038-srg.jar%2325!:?] {re:classloading,pl:accesstransformer:B}
	at java.lang.Thread.run(Thread.java:831) [?:?] {}


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
	Minecraft Version: 1.17.1
	Minecraft Version ID: 1.17.1
	Operating System: Linux (amd64) version 5.4.0-81-generic
	Java Version: 16.0.2, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode, sharing), Oracle Corporation
	Memory: 1595465824 bytes (1521 MiB) / 3091202048 bytes (2948 MiB) up to 8589934592 bytes (8192 MiB)
	CPUs: 10
	Processor Vendor: AuthenticAMD
	Processor Name: AMD Ryzen 7 5800X 8-Core Processor
	Identifier: AuthenticAMD Family 25 Model 33 Stepping 0
	Microarchitecture: Zen 3
	Frequency (GHz): -0.00
	Number of physical packages: 1
	Number of physical CPUs: 8
	Number of logical CPUs: 16
	Graphics card #0 name: unknown
	Graphics card #0 vendor: unknown
	Graphics card #0 VRAM (MB): 0.00
	Graphics card #0 deviceId: unknown
	Graphics card #0 versionInfo: unknown
	Virtual memory max (MB): 65433.52
	Virtual memory used (MB): 96968.64
	Swap memory total (MB): 1023.99
	Swap memory used (MB): 1023.98
	JVM Flags: 2 total; -Xms128M -Xmx8192M
	Data Packs: vanilla, mod:forge
	Is Modded: Definitely; Server brand changed to 'forge'
	Type: Dedicated Server (map_server.txt)
	ModLauncher: 9.0.7+91+master.8569cdf
	ModLauncher launch target: forgeserver
	ModLauncher naming: srg
	ModLauncher services:
		 mixin PLUGINSERVICE
		 eventbus PLUGINSERVICE
		 object_holder_definalize PLUGINSERVICE
		 runtime_enum_extender PLUGINSERVICE
		 capability_token_subclass PLUGINSERVICE
		 capability_inject_definalize PLUGINSERVICE
		 accesstransformer PLUGINSERVICE
		 runtimedistcleaner PLUGINSERVICE
		 mixin TRANSFORMATIONSERVICE
		 fml TRANSFORMATIONSERVICE
	FML Language Providers:
		minecraft@1.0
		javafml@null
	Mod List:
		server-1.17.1-20210706.113038-srg.jar             |Minecraft                     |minecraft                     |1.17.1              |DONE      |Manifest: NOSIGNATURE
		forge-1.17.1-37.0.97-universal.jar                |Forge                         |forge                         |37.0.97             |DONE      |Manifest: 22:af:21:d8:19:82:7f:93:94:fe:2b:ac:b7:e4:41:57:68:39:87:b1:a7:5c:c6:44:f9:25:74:21:14:f5:0d:90
	Crash Report UUID: e4783aaa-406c-4f70-a83f-40b479003d07
	FML: 37.0
	Forge: net.minecraftforge:37.0.97