Subscribe Link is only Base URL

[IT Operations]

Hey all together,

Maybe someone have discovered this issue already. When I try to subscribe to a Team Calendar via the subscribtion button, I have got the opportunity to choose a desired app to subscribe with. There should be a link for the subscription then. All I see is the Base URL of my confluence there. Nothing more.

e.g. https://this-is-my-confluence.com/

Shouldnt there be more to it?

Thanks for your help and goodbye