When checking or applying licenses in Evolon Edge, ensuring the time/date is synced properly will reduce the number of issues that can occur.
Situation 1: When the license is loaded, it disappears. This happens most often when the license is time based and is beyond the expiration date, per the cameras time-date reference.
Situation 2: The app reports an invalid Date-Time. This happens when a cameras time-date has been moved back. Correct the cameras time and the license should show properly. If the time has not changed, contact Evolon Support.