Was this error previously in that installation? Did it show up with a version upgrade?
In order to help you please provide a more detailed description of your issue with Avaya Aura Web Gateway:
Could you please elaborate on the AAWG functionality blocked?
What is the status of the AAWG server in the administration console?
Also, please include:
Which version of the SDK do you use? On which platform? (Windows, IOS, Android, Web)
Avaya DevConnect support team