Android Guardian App Error "We cannot contact the server. Please check your internet connection and try again later"

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Problem statement

The Auth0 Guardian app on Android devices does not launch successfully. Uninstalling and reinstalling the app also does not resolve the issue. Multiple users on various builds of Android are getting the below error.

We cannot contact the server. Please check your internet connection and try again later.

Also, the following message is in the Auth0 tenant logs,

Guardian - There was an error sending the push notification

Symptoms

The users who uses Android Guardian app cannot get push notification, in the tenant logs there is “Guardian - There was an error sending the push notification” error message.

{
    "date": "<REDACTED>",
    "type": "gd_send_pn_failure",
    "description": "Guardian - There was an error sending the push notification",
    "ip": "<REDACTED>",
    "user_agent": "Chrome 118.0.0 / Windows 10.0.0",
    "details": {
      "request": {
        "method": "POST",
        "path": "/api/push/configs/<REDACTED>/authenticators/<REDACTED>/challenge",
        "query": {},
        // Other fields omitted for brevity
      },
      "response": {},
      "enrollment": {},
      "device_id": "<REDACTED>"
    },
    // Other fields omitted for brevity
  }

The Auth0 Guardian app on Android device fails to launch with the following error message:
“We cannot contact the server. Please check your internet connection and try again later.”

Cause

The issue was caused by the incident MFA Push Notification Failures in US-1. The issue is fixed in the latest Android Guardian app (>1.7.2)

Solution

If the Android Guardian app version is lower than 1.7.2, please update to the latest version to fix the issue.

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