New Notebook button unavailable

[RHiggins]

I am trying to create a new notebook, but there is not an option to do so. I am a GIS Professional Advanced user and have a publisher role. Any help with why I cannot create a new one would be appreciated.

[David_McRitchie]

Can we confirm if this is happening on other browsers and if it returns after clearing the browser cache and cookies?

Many thanks,

David