One of our existing apps has recently started displaying the "vuforia missing key" error on device after doing a new build.
We do not seem to get any errors in editor and we have double checked the license key. We have been doing builds for the last 9 Months and now this issue has appeared.
Any Suggestions? We are using Vuforia 6.2.10 version and Unity Version 5.5.2 p4
Many Thanks in Advance.