As per your Account details,you have Lightroom 6 and it should work fine.
There are some known issues with current version of Lightroom. Please refer Update on Lightroom 2015.2 / Lightroom 6.2 Release
Are you getting the message Lightroom trial Expired when you open Lightroom as well.If so see Re: Sign in Required CS6 Adobe Photoshop
The 30 day trial refers to Lightroom Mobile. When you first install Lightroom 6 you are allowed 30 days to evaluate the merits of Lightroom Mobile did decide whether or not you want to subscribe to the creative cloud so that you can continue to take advantage of that feature. You can stop that message from displaying if you click in that identity plate. You will see Lightroom Mobile listed, and you can click to pause it. After you do that you won't receive that message anymore.
That's what happened to me, and what you stated worked for me. Thanks.