Hello I get this message when I try to open CC AE 2017:

"Please uninstall and reinstall the product.

If this problem still occurs, please contact Adobe technical support for help, and mention the error code shown at the bottom of this screen.

Error: 16

http://www.adobe.com/support/"

Anybody knows what to do? The application worked normally until moments ago. Do I have to reinstall the whole application?

I got it solved - temporarily. When I went to Library/Application Support/Adobe (not under user account, but directly under computer account), and hit Cmd+I and changed permissions to "Read and write" for all three types of users, and then selected "Use for included objects" in the gear, AE started again. Only that it now says "7 days trial", although I have a month-per-month licence.