Adding VPP (iOS) licenses to Sites

Hello,

I'm at the point where I had to create Sites in Jamf. 

I've never had a problem adding VPP licenses to apps but now when I scope an app, i.e. GMail, to "Campus A", I get "Content not available to assign to mobile devices".

If I remove the site (in other words Full Jamf), I can assign VPP to the apps. (I tried adding it first to Full Jamf and then changing it to Site and I still had the same problem).

Do I need to add these sites to ASM?