java.lang.IllegalArgumentException: Name and ID cannot both be blank
at com.mojang.authlib.GameProfile.<init>(GameProfile.java:26)
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillGameProfile(YggdrasilMinecraftSessionService.java:186)
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillProfileProperties(YggdrasilMinecraftSessionService.java:173)
at net.minecraft.client.Minecraft.launchIntegratedServer(Minecraft.java:2421)
at net.minecraft.client.gui.GuiCreateWorld.actionPerformed(GuiCreateWorld.java:224)
at net.minecraft.client.gui.GuiScreen.mouseClicked(GuiScreen.java:443)
at net.minecraft.client.gui.GuiCreateWorld.mouseClicked(GuiCreateWorld.java:416)
at net.minecraft.client.gui.GuiScreen.handleMouseInput(GuiScreen.java:533)
at net.minecraft.client.gui.GuiScreen.handleInput(GuiScreen.java:501)
at net.minecraft.client.Minecraft.runTick(Minecraft.java:1759)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1098)
at net.minecraft.client.Minecraft.run(Minecraft.java:3942)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
A detailed walkthrough of the error, its code path and all known details is as follows:
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