Fabric hangs on "Setting user: Player***"

[Xendergo]

Whenever I debug a mod, I get this warning:

@Mixin target net/minecraft/tag/RequiredTagList$TagWrapper is public in fabric-tag-extensions-v0.mixins.json:MixinTagImpl and should be specified in value
 com.mojang.authlib.exceptions.AuthenticationUnavailableException: null

and a stack trace, generally pointing to YggdrasilSocialInteractionsService.java, whatever that is.

Then Fabric hangs on Setting user: Player***

After waiting a while, I noticed the message seemed to change to [main/ERROR] (Minecraft) Failed to verify authentication

What's going wrong, is it just me or is it happening to everyone?

[haykam821]

The @Mixin target and Failed to verify authentication errors are development environment quirks and can be safely ignored.

Which Java/LWJGL versions are you using? I've had some issues with version conflicts in production where the game would hang sometime around here.

In addition, you say debugging the mod causes the issue. Does ./gradlew runClient or a production environment from ./gradlew build work?

[haykam821]

Which platform are you using? Also, are you using any Java GUI libraries?

[Xendergo]

I'm using AdoptOpenJDK, and I'm not using any GUI libraries

[Xendergo]

I found the issue, I was trying to create a block which stores two numbers with very large ranges in it's block state, and it seems like it was registering every possible permutation of those numbers, I had no idea it did that. I guess I'll have to use a block entity instead

[liach]

I think your computer may be just a bit slow at loading. Notice that auth error will always happen as long as you don't send a valid session token (i think) to client's command line

[YTG1234]

Notice that auth error will always happen as long as you don't send a valid session token (i think) to client's command line

Indeed that's how it works. You can use transfarmer's NoAuth if you'd like to get rid of authentication entirely.