Lightroom Mobile is not a part of Lightroom 6 ( Perpetual ) , however once you purchase the Standalone version of Lightroom and install it on the computer, you get 30 days trial for Lightroom Mobile.
So you need not worry about the Trial Expired for Lightroom Mobile.
Let me know if it helps.
So there is nothing I have to do?
How can I get rid of this text?
I am sorry, however there is no option to get rid of it.
I would suggest you to please ignore this message.
I have the same problem. However, it impacts operation of Lightroom! When I edit a picture and proceed to another, I select PREVIOUS and then get the yellow error message " Lightroom Mobile Trial Expired" and the edits do not translate to the new selected picture.
What's happening and how do I correct it?