Pls Help, Exception in server tick loop

[MatiasMLG]

---- Minecraft Crash Report ----
// I just don't know what went wrong

Time: 08/11/19 12:18 AM
Description: Exception in server tick loop

com.google.gson.JsonParseException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $
    at zs.a(SourceFile:507)
    at zs.a(SourceFile:523)
    at xz.g(SourceFile:146)
    at uj.z(SourceFile:98)
    at uj.<init>(SourceFile:25)
    at uk.d(SourceFile:185)
    at net.minecraft.server.MinecraftServer.run(SourceFile:615)
    at java.lang.Thread.run(Unknown Source)
Caused by: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $
    at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1559)
    at com.google.gson.stream.JsonReader.checkLenient(JsonReader.java:1401)
    at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:593)
    at com.google.gson.stream.JsonReader.peek(JsonReader.java:425)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:74)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:61)
    at zs.a(SourceFile:505)
    ... 7 more

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

-- System Details --
Details:
    Minecraft Version: 1.14.4
    Minecraft Version ID: 1.14.4
    Operating System: Windows 8.1 (amd64) version 6.3
    Java Version: 1.8.0_231, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 594991760 bytes (567 MB) / 847773696 bytes (808 MB) up to 1908932608 bytes (1820 MB)
    CPUs: 4
    JVM Flags: 0 total; 
    Data Packs: 
    Is Modded: Unknown (can't tell)
    Type: Dedicated Server (map_server.txt)

[DaemonUmbra]

This isn't a Forge crash, but it looks like you managed to make a json invalid