Can't associate with Microsoft Account

[Yukuai]

Hello everyone,

I'm trying to run FTB with the app but when I try to run an instance the app asks me to login with an Account Microsoft, even if I did it (it shows me a page with

You're in!​

You can now safely close this tab and return to the FTB App.) it gives me an error that it's "Unable to fetch profile from Minecraft account (no id found)".
I'm over 18, I've got Minecraft on this Microsoft account ... I don't know how to do else :-(

 

[Yukuai]

Hello everyone,

I'm sorry to urge, but I really need help about this problem. I can't play FTB because my Microsoft Account is not recognised by FTB App, I can't neither find some log to help understand why the account is refused, please: help me!

 

[frognik]

I have this exact same problem.
I can launch any modpacks through CurseForge app just not on FTB app.

 

[frognik]

I have a workaround.
Install Direwolf20 1.18 on FTB app and open the containing folder.
Open CurseForge and create a new custom profile and name it Direwolf20 1.18 and use Forge version 40.1.30 and run it at least once.
Open the new custom profile's containing folder and copy all the files from the FTB app containing folder to there overwriting any files if needed.
Run the custom profile and you'll be playing Direwolf20 1.18 using the CurseForge app.

Should be able to do this with any FTB pack as long as you set the right Forge version.

 

[Yukuai]

But why I can't add my Microsoft Account? It'll be a good thing to know this, cause so I can fix it ...