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Problem

When sending push notifications in iOS to a reachable user, the “APNS Client Connection” error occurs.

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Explanation

This error can happen for the following reasons:
  • The APNS certificate linked to the PEM file on the MoEngage dashboard has expired or been revoked.
  • The AuthKey has been revoked on the Apple Developer account.

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Solution

Create a new PEM file or AuthKey and upload it on the MoEngage dashboard.