Server Error

[21:32:40] [Server thread/WARN]: Failed to load white-list:
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
at com.google.gson.Gson.fromJson(Gson.java:815) ~[Gson.class:?]
at com.google.gson.Gson.fromJson(Gson.java:768) ~[Gson.class:?]
at net.minecraft.server.management.UserList.func_152679_g(SourceFile:137) ~t.class:?]
at net.minecraft.server.dedicated.DedicatedPlayerList.func_72418_v(SourceFile:123) [lc.class:?]
at net.minecraft.server.dedicated.DedicatedPlayerList.<init>(SourceFile:30) [lc.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:215) [ld.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:431) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]
Caused by: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
at com.google.gson.stream.JsonReader.beginArray(JsonReader.java:338) ~[JsonReader.class:?]
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:79) ~[CollectionTypeAdapterFactory$Adapter.class:?]
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60) ~[CollectionTypeAdapterFactory$Adapter.class:?]
at com.google.gson.Gson.fromJson(Gson.java:803) ~[Gson.class:?]
... 7 more