[MCL-11108] Launcher closes immediately after being opened if beta versions are enabled

Mod Notice

Here's how to disable the beta launcher again:

If you switched to the beta launcher and can't log in, you can switch back by editing launcher_profiles.json in your minecraft folder. Change the "channel" field from "beta" to "release".

– This tweet by [Mojang] slicedlime

Here's a guide on how to find your minecraft folder: Click me

JSON files can be opened and edited by any plain text editor.

If you need any further assistance with opting out of the beta launcher, please join the Community Support help chat. There are people in there that can help you.

The bug

The launcher is closed immediately after being opened. I am on the beta channel. This is happening since the launcher has been released. Switching to the release channel by editing launcher_profiles.json solves the issue.

I have attached the launcher log, as well as the native log.

To reproduce

Open launcher
Go to "Settings"
Enable beta versions
→ Launcher closes. When trying to open it again, it'll close again