Cant start Mc Server

[herry]

this is the crash report

 

---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 29.11.20 14:53
Description: Exception in server tick loop

com.google.gson.JsonSyntaxException: Expected a com.google.gson.JsonArray but was com.google.gson.JsonPrimitive
    at com.google.gson.internal.bind.TypeAdapters$35$1.read(TypeAdapters.java:913)
    at com.google.gson.Gson.fromJson(Gson.java:887)
    at com.google.gson.Gson.fromJson(Gson.java:825)
    at acy.f(SourceFile:118)
    at zf.y(SourceFile:95)
    at zf.<init>(SourceFile:22)
    at zg.d(SourceFile:169)
    at net.minecraft.server.MinecraftServer.w(SourceFile:645)
    at net.minecraft.server.MinecraftServer.a(SourceFile:257)
    at java.lang.Thread.run(Unknown Source)

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

-- System Details --
Details:
    Minecraft Version: 1.16.4
    Minecraft Version ID: 1.16.4
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_261, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 3485908592 bytes (3324 MB) / 4207738880 bytes (4012 MB) up to 4207738880 bytes (4012 MB)
    CPUs: 12
    JVM Flags: 5 total; -Xmx4096M -Xms4096M -Xincgc -Xmx4096m -Xms4096m
    Data Packs: vanilla
    Is Modded: Unknown (can't tell)
    Type: Dedicated Server (map_server.txt)

[diesieben07]

That does not look like a Forge log.