Bukkit

when players in spectate and the game end. players are not teleport out and game not finish error:
[15:56:38] [Server thread/WARN]: [SurvivalGames] Task #638902 for SurvivalGames vBeta dev1.9.4b generated an exception
java.lang.IllegalArgumentException: Cannot make player fly if getAllowFlight() is false
    at org.bukkit.craftbukkit.v1_8_R1.entity.CraftPlayer.setFlying(CraftPlayer.java:1150) ~[craftbukkit.jar:git-Spigot-ed3e3af-ee6d0fa]
    at me.maker56.survivalgames.user.UserManager.setState(UserManager.java:187) ~[?:?]
    at me.maker56.survivalgames.user.UserManager.leaveGame(UserManager.java:34) ~[?:?]
    at me.maker56.survivalgames.game.Game.kickall(Game.java:310) ~[?:?]
    at me.maker56.survivalgames.game.phases.ResetPhase.start(ResetPhase.java:20) ~[?:?]
    at me.maker56.survivalgames.game.phases.ResetPhase.<init>(ResetPhase.java:16) ~[?:?]
    at me.maker56.survivalgames.game.Game.end(Game.java:319) ~[?:?]
    at me.maker56.survivalgames.game.phases.FinishPhase$1.run(FinishPhase.java:26) ~[?:?]
    at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[craftbukkit.jar:git-Spigot-ed3e3af-ee6d0fa]
    at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [craftbukkit.jar:git-Spigot-ed3e3af-ee6d0fa]
    at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:709) [craftbukkit.jar:git-Spigot-ed3e3af-ee6d0fa]
    at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [craftbukkit.jar:git-Spigot-ed3e3af-ee6d0fa]
    at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:634) [craftbukkit.jar:git-Spigot-ed3e3af-ee6d0fa]
    at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:537) [craftbukkit.jar:git-Spigot-ed3e3af-ee6d0fa]