# Build failure

### Why is my app build failing?

If your build is failing, your build is not working, or your download is not completing, it is usually due to a configuration issue.

Check the exact error message shown in the Download section and match it with the issue below.

#### Common build failure reasons

* Certificate mismatch (iOS)\
  The provisioning profile does not match the uploaded distribution certificate.

{% content-ref url="/pages/IqK3cxWXLggdoahp8qYV" %}
[Provisioning profile mismatch](/app/download/build-failure/provisioning-profile-mismatch.md)
{% endcontent-ref %}

* Notification profile mismatch (iOS)\
  The notification provisioning profile Bundle ID does not match the app.

{% content-ref url="/pages/k9rDcRUxbtMpDPh0A3oO" %}
[Notification profile mismatch](/app/download/build-failure/notification-profile-mismatch.md)
{% endcontent-ref %}

* Expired certificate (iOS)\
  The uploaded distribution certificate has expired.

{% content-ref url="/pages/lCGj4P5zCddTOIwE8rUe" %}
[Expired iOS certificate](/app/download/build-failure/expired-ios-certificate.md)
{% endcontent-ref %}

* Invalid Firebase configuration\
  Firebase settings, keys, or IDs are incorrect or incomplete.

{% content-ref url="/pages/MYrWBBHBhlS4ayFW5UQg" %}
[Invalid Firebase configuration](/app/download/build-failure/invalid-firebase-configuration.md)
{% endcontent-ref %}

* Invalid Firebase file\
  The uploaded Firebase configuration file is incorrect or does not match your app.

{% content-ref url="/pages/DXdarAOrC27WtmxlgnEj" %}
[Invalid Firebase File](/app/download/build-failure/invalid-firebase-file.md)
{% endcontent-ref %}

* Android build error\
  Unsupported special characters in the app name may cause the Android build to fail.

{% content-ref url="/pages/xYgB2GjTaiCQWHY9mhBi" %}
[Android build failure](/app/download/build-failure/android-build-failure.md)
{% endcontent-ref %}


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