Xbox App error

[Tonrab_the_Great]

I’m getting the below error when adding in my server using the Xbox app.  I’ve removed it and reinstalled it but it’s still the same.  Any ideas?
As    

[TheDreadPirate]

What server version are you running?

[Tonrab_the_Great]

Hi it’s 10.9.9 and I’m running it in Windows

[TheDreadPirate]

Have you recently added any themes or custom CSS?

[TheDreadPirate]

Has the Xbox app ever worked? Or is this your first time trying?

[Tonrab_the_Great]

I removed a theme yesterday and it’s now the default, I used the skins addon, but set it back to jellyfin default, and it’s the first time I have tried to use the app

[TheDreadPirate]

Honestly not even sure the Xbox app works with 10.9. It's been a while since it's been updated.