Problem:

When using Incident Zones, the following error occurs:

Mobile push alert delivery method is required

Root Cause:

Organizations using Public Incident Zones do not have the Mobile Push Alert delivery method enabled in their organization settings by default.

Solution:

To enable the Mobile Push Alert delivery method, see Knowledge Base Article 000003336 - Mobile: How to Enable the Everbridge Mobile App (EMA) As a Delivery Method for an Organization.