Sonarlint Authentication failure on sonarcloud.io

Visual Studio 2022, 17.5.5, SonarLint 6.15.0.67199, SonarCloud organization account

I am taking over an existing C# solution in our organization and its comes with a sonarcloud project already setup.
Now, when I try to connect SonarLint to this project, I do get an authentication failure:

Connecting to SonarQube server: https://sonarcloud.io/
Connecting to SonarQube server: Validating credentials
Connecting to ‘https://sonarcloud.io/’.
Connected to SonarCloud ‘8.0.0.40601’.
SonarQube request failed: Invalid credentials
Connecting to SonarQube server: Failed
Disconnecting…

What I did: setup a PAT on sonarcloud, tried to connect through the extension (SonarLint->Connected Mode->Bind to…), used the prefilled server URL https:sonarcloud.io, entered the PAT name and the PAT secret.

The same procedure works usually fine on our self hosted server with dozens of projects. But I cant get it to connect to sonarcloud.

Any ideas appreciated.

This sounds suspcious. The UX for providing a token isn’t great. You should only provide the token in the Username/Token field, no other information.