Solved by adobe support - I'm on windows and if you 'run as adminstrator' that solves the problem. You can make that permanent by right clicking on the short cut, selecting 'properties', select the properties tab and tick 'run this program as an administrator'. I get a box now when I open AE saying 'do you want to allow this app to make changes to your PC' but can live with that.
Thank you for sharing what worked for you!
Having the same issue using a mac. any help?