When I click "play" on the launcher, i get the following message: "[14:34:48] [Client thread/INFO]: Setting user: Roanski23 [14:34:48] [Client thread/INFO]: (Session ID is token:0711486542c448ddbb44dac90163e2b9:0d4c029ce5024306a82e83d0095184d4) Exception in thread "Client thread" 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) at com.google.gson.Gson.fromJson(Gson.java:768) at lu.b(SourceFile:151) at lu.<init>(SourceFile:43) at net.minecraft.server.MinecraftServer.<init>(SourceFile:155) at bpp.<init>(SourceFile:41) at avf.<init>(SourceFile:291) at net.minecraft.client.main.Main.main(SourceFile:124) 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) at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:79) at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60) at com.google.gson.Gson.fromJson(Gson.java:803) ... 7 more Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release"
Environment
Put your operating system (Windows 7, Windows XP, OSX) and Java version if you know it here
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-51590. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.