Your screen-clip indicates you are using Lightroom-CC2015/v6. (old!)
If you pay for a Creative Cloud subscription you need to be currently 'financial' and paid up, and then be Signed-In to the Desktop App as suggested by @cmgap . And you should update to Lr-Classic v10.2
If you do NOT subscribe (and pay) you will need to reinstall your Lightroom v6.?? as the Perpetual Standalone version that uses a Serial Registration Key.
Completing these two steps will leave an individual in an excellent position to then install older Adobe applications. When the applications are installed, they will also receive a version appropriate version of the update and licensing components.
These same steps should also be utilized if someone is canceling their CC membership and wants to revert to Creative Suite (Standalone Lightroom). If they do not, then they may receive messages about needing a subscription to use their perpetual software title.