Can you translate that error message to English or describe in more detail what's happening when you try to open After Effects? This will help us better troubleshoot your issue.
Installing CS6 is not really an upgrade, since it appears you have Creative Cloud 2015 installed. If you have a Cloud subscription, you can download CS6 from the Desktop App. Instructions are available here: Download and install Adobe Creative Cloud apps.
Let us know if you need further information.