Can replicate and duplicate of MCPE-177064
Bump!
issue still present in the latest version
Does this issue occur on the newest Laucher? - yes (launcher for 10/11)
Have you tried to install Launcher from the minecraft.net website/MS store? - tried both, same issue
Are you logged in in both Xbox app, MS store, and Launcher with the same MS account ? - logged in on store and xbox app, attempting to log on to mc launcher
Is your Windows and associated apps (Xbox app, MS store) up-to-date? yes
Have you tried to re-registering MS store as written here ? no (EDIT - YES)
Do you use VPN or any of the incompatible software on machine you try to log-in? - no
Could you provide us with more in-depth repro steps? - view screenshots in my other message
I found this duplicate (MCL-19641) helpful to understand the issue
quote;
If you try to sign in with a Microsoft account, the launcher opens a custom in-app web view to render the Microsoft login page.
This comes with a number of problems
1) This web view does not support U2F security keys or Windows hello properly (leading to the error screen attached below)
2) Copying over your credentials from a potential password manager is very inconvenient
Many Apps have solved this problem by extracting the process of signing in to your account to your browser. This enhances the login process greatly as a) you're mostly already logged in and b) browsers support all the required security features like WebAuthn, which would enable U2F security keys and Windows Hello, which are both already supported by Microsoft accounts.
Another way which could be used additionally on Windows is the internal Microsoft Account System used by other Microsoft Apps, like the Windows Store, the XBox App or Cortana,
[media]As you can see here the Account which is already tied to the windows account, is preselected and another login method supporting all security features is provided
Instead, what you get right now when trying to use the above-mentioned methods is this error screen (This just happens if you click the "Sign in with Windows Hello or a security key" link on the main login page, if you enter an email address and then use a security key it works
[media]
This issue is really similar to MCL-18142 which got closed for being invalid and this being an account issue, but it's not it's an issue with the way the Microsoft page gets loaded and not related to specific accounts being used to test it
Also, there is no information for what more to specify - I have given all request information
Can this be moved to a higher priority? this bug has been reported for quite a while
please fix, annoying issue
to answer your questions
Does this issue occur on the newest Laucher? - yes (launcher for 10/11)
Have you tried to install Launcher from the minecraft.net website/MS store? - tried both, same issue
Are you logged in in both Xbox app, MS store, and Launcher with the same MS account ? - logged in on store and xbox app, attempting to log on to mc launcher
Is your Windows and associated apps (Xbox app, MS store) up-to-date? yes
Have you tried to re-registering MS store as written here ? no (EDIT - YES)
Do you use VPN or any of the incompatible software on machine you try to log-in? - no
Could you provide us with more in-depth repro steps? - view screenshots
If you cannot reproduce the problem without the mod, this is likely an issue with MCTiers. Mojang cannot provide support for mods so perhaps you should seek support with MCTiers. This bug is also listed for version 1.21.2 Release Candidate 1 whereas (looking in the screenshot) this bug seems to be for version 1.20.1. As stated by the bot, only bugs on the latest version and the latest snapshot are allowed.