It is very hit and miss whether Iightroom will let me add new photos. At the moment it won't. The plus button for adding photos does nothing when I click on it, It also won't let me look at my current photos. I can see I have 80 photos but again nothing happens when I click on the tab
If you have more than one Adobe ID, one that is past the 7-Day Trial expiration and one that is part of a valid subscription and you are logged into the first ID when you can't add photos and the second ID when you can, that would explain it. Is there a chance you are using multiple Adobe IDs?