When I click Login with Apple nothing happens. When I click login with a Token and enter an App Specific Token generated from my Apple account it just doesn't move on to the login page like it worked on MX Linux the Token way I was able to access the Apple ID login page but now I just get nothing running Nitrux. I click Next ok Ok whatever and it just stays in the Token box displayed... I don't get why I can't use "Sign in with Apple ID" wasn't the program designed so you can do what it says it is doing? I bought it, I should be able to login.

Here on Linux Mint. Same issue. I tried the deb and flathub. Neither worked. I used the portable version, which did not work. Then I moved the portable version from download folder to document and tried again. starting this time it did an update from two days ago. works now with portable version.

A workaround I found was, doing force reload  and then clicking again on "Sign in with Apple".

On Fedora. Tried AppImage and Flatpak version. Cant get signed into either. 

What worked for me on arch was to in the onboarding "skip this step", after the onboarding a popup appeared to update the version. After updating there, I was able to sign in with apple.

I did the skip this step and updated then you go to ...>Apple Music> Sign In. Worked smoothly.

In Windows, I updated to 2.6.1.9 and it logged me in automatically. I was at 2.6.0.15.

just installed on macOS and had to "Force Reload" to get the Apple Music login browser window to appear!