Solved...!!! "Cannot complete action" in family sharing Solved..!!!
Hi everyone,
I was having the same exact problem and could not add any of my family members until i found the solution by my self..
Here how you can add them easily...
Go to family sharing settings on you iPhone
Click on any of followings;
Purchase Sharing,
Apple Music,
iCloud Storage.
If you still get the "can not complete this time error"
go back and click on "Location Sharing" and follow the instruction...
This will give you option to send the invitations to your family members.
Hope this will work for you....Enjoy...!
iPhone 8, iOS 11.4