Minecraft 1.16.5 "Multiplayer" button grayed out when using offline account

[TheJoshue]

Operating System

Windows

Version of Prism Launcher

Prism Launcher 7.2

Version of Qt

Qt 6.5.1

Description of bug

When you try run 1.16.5 version of MC using premium account, it works fine.
However if you try running the same version, no matter the circumstances (if you have some resourcepack loaded, optifine or else) it won't let you click the "Multiplayer" and "Minecraft Realms" buttons.

Steps to reproduce

1. Run MC 1.16.5 instance from PrismLauncher
2. Wait for it to load the main MC screen
3. See grayed out "Multiplayer" and "Minecraft Realms" buttons that are not accessible:
   

Suspected cause

Sine recent changes related to Microsoft migrating Mojang accounts to Microsoft? I am not sure.

This issue is unique

• I have searched the issue tracker and did not find an issue describing my bug.

[TheJoshue]

I did not mention that this issue does not happen on other launchers that can run offline accounts, I can confirm that as i tested and it works correctly.

[fefroyo]

How to fix multiplayer to enabled?

[TheJoshue]

How to fix multiplayer to enabled?

wait for devs to reply to here and wait for fix

[teknixstuff]

Can confirm. A temporary workaround is to disable your internet before launching (can be re-enabled after title screen loads). Also when trying to /kick yourself from singleplayer (to bypass button and join multiplayer), a server can be joined, but chat is blocked. Internet disabling allows chat to work fine too.

[tesseract-two]

Can confirm as well. This was not happening with my Mojang account. Last launched 1.16 with my Mojang account around three days ago. I just migrated and this happens now. Edit: this issue is not present in 1.15.2, 1.17.1, 1.18.2, 1.19.2, or 1.20.1.

[GabubuAvailable]

Can also confirm this...

[LostLuma]

Related: FabricMC/fabric-loom#915 (comment)