Watch 2 can't install any gps sport app

Hi

i don't know if i'm doing something wrong, but i can't install any gps sport app on my watch 2 38mm.

If i try to install nike run club from iphone (in the watch app) it only install it on my iphone, and no app is installed on the watch. When i try to install it on my watch it gives me error "cannot perform this action at the moment" and i see that it says "watch os 7 or newer is needed" (where if i'm not mistaken the last version for watch 2 is 6).

Same thing for other gps-running apps.

What should i do?

Thanks