Lightroom v6.14

I have had the stand alone version of Lightroom 6.14 since 2018.  Out of the blue, when I launched Lightroom it wants me to sign into my Adobe account.  When I sign in, the only option is to start a 30 day free trial of  Lightroom 6.  When I enter my activation code I keep going in a loop. How do I get past this? The only option presented is a "free trial".

{Moved from Lightroom Cloud to Lightroom Classic Forum by Moderator}