Why Does the Default SMS Connector Error Occur When Creating a Campaign?

Problem

The following error is displayed during the SMS campaign creation:

No default SMS connector is configured. Please set a default SMS connector and proceed.

You must configure an SMS connector to use SMS campaigns.
1. On the left navigation menu in the MoEngage dashboard, go to Settings > Channels > SMS > Sender configuration.
2. Hover over the required connector and click the ellipsis icon.
3. Click Mark as default.
MoEngage supports multiple connectors, but you must select one as the default.
You will encounter this error if you haven't set a default connector. Setting one as the default will resolve the issue.