This feature request is raised in behalf of user
Adobe serial number prompt for subscription user
This error occured due to old license file which was available on system as Acrobat was transitioned from 2017 to Acrobat Pro DC.

Issue is resolved by adding IsNGLEnforced serial key.

• If adding registry is fixing the issue, it should be available by default on every system when application is installed. -It will eliminate such error in future.