Error: Session exists already

The "License key validation failed: Session exists already" error can happen when you are using a developer license key from two different sessions at the same time. This can mean that:

• Two different people are using the same license.
• 1 person is using the same license in two different machines simultaneously.
• 1 person is using the same license in two different browsers simultaneously.

Please see section on Developer license for more details and ways to get around this.