Added unknown CA troubleshooting (#834)

* Added unknown CA troubleshooting * Update site/content/contribute/mobile/push-notifications/service.md Co-authored-by: Carrie Warner (Mattermost) <74422101+cwarnermm@users.noreply.github.com> * Update site/content/contribute/mobile/push-notifications/service.md Co-authored-by: Carrie Warner (Mattermost) <74422101+cwarnermm@users.noreply.github.com> Co-authored-by: Justine Geffen <justinegeffen@users.noreply.github.com> Co-authored-by: Carrie Warner (Mattermost) <74422101+cwarnermm@users.noreply.github.com> Co-authored-by: Ben Schumacher <ben.schumacher@mattermost.com>
mattermost · Aug 2, 2021 · b058d1e · b058d1e
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commit b058d1e
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/site/content/contribute/mobile/push-notifications/service.md b/site/content/contribute/mobile/push-notifications/service.md
@@ -187,7 +187,11 @@ panic: Failed to load the apple pem cert err=failed to parse PKCS1 private key f
 
 **For iOS / Apple Push Notifications**: If the logs are reflecting DeviceTokenNotForTopic (error 400) this may be because you're using an older / previous Device ID. Re-run the queries you need to get device IDs and test.
 
-This could also be because you generated a certificate for the wrong bundle ID. The bundle ID used in `mattermost-push-proxy.json` should be the same one as the app and the for the same app it was generated for.
+This could also be because you generated a certificate for the wrong bundle ID. The bundle ID used in `mattermost-push-proxy.json` should be the same one as the app, and should be for the same app it was generated for.
+
+##### *TLS: Unknown Certificate Authority* error
+
+**For iOS / Apple Push Notifications**: If you see a message in the push proxy log that includes `tls: unknown certificate authority` for iOS devices, it's likely Apple has invalidated your client certificate, or you're using a client certificate without [the correct certificate authority.](https://developer.apple.com/news/?id=7gx0a2lp) To resolve this, follow [these instructions to generate a new certificate](https://developers.mattermost.com/contribute/mobile/push-notifications/ios/), and then [upload it to your push proxy server](#set-up-mattermost-push-notification-service-to-send-ios-push-notifications).
 
 ### Reporting issues