Did you check the permissions of the folder it mentions?
Thanks for for the reply I checked went and checked the permissions like you suggested. Unfortunately if I go to /Users/me/Documents/Adobe ...there is no After Effects CC 2015 folder only one folder called Adobe Media Encoder.
I found a folder named Adobe After Effects CC 2015 under Applications but the permissions are the same as for Adobe Illustrator CC 2015 which is working just fine.
Unfortunately if I go to /Users/me/Documents/Adobe ...there is no After Effects CC 2015
Yes. That's to be expected. Read the error message a little more carefully. It says that the After Effects CC 2015 folder could not be created due (possibly) to a permissions issue with the parent folder.