I tried to start my server it crashes and i get this message

[11:09:46 INFO]: Default game type: SURVIVAL
[11:09:46 INFO]: Generating keypair
[11:09:47 INFO]: Starting Minecraft server on *:25565
[11:09:47 ERROR]: Encountered an unexpected exception
java.lang.IllegalArgumentException: Name and ID cannot both be blank
at com.mojang.authlib.GameProfile.<init>(GameProfile.java:27) ~[minecraft_server.14w10a.jar:?]
at com.mojang.authlib.yggdrasil.YggdrasilGameProfileRepository.findProfilesByNames(YggdrasilGameProfileRepository.java:37) ~[minecraft_server.14w10a.jar:?]
at pe.a(SourceFile:48) ~[minecraft_server.14w10a.jar:?]
at pe.a(SourceFile:101) ~[minecraft_server.14w10a.jar:?]
at my.aF(SourceFile:421) ~[minecraft_server.14w10a.jar:?]
at my.g(SourceFile:145) ~[minecraft_server.14w10a.jar:?]
at net.minecraft.server.MinecraftServer.run(SourceFile:367) [minecraft_server.14w10a.jar:?]
at mp.run(SourceFile:667) [minecraft_server.14w10a.jar:?]