Nobody can tell you anything without exact system info or other technical details like exact version of AE, preference settings and so on.
Martin: Please also answer some basic questions: Did you buy After Effects off the Adobe website? Are you launching After Effects from the Creative Cloud desktop app? Is it possible that you're on a team and a Creative Cloud for Teams license was purchased? Adobe ID has no registered products listed
The more specifics you supply, the more we can help you.