iOS push certificate expired?

iOS push certificate expired?

Hello!

Two of our clients have a problem with the MFA-Authorization since a few days.
Both are using the app on iOS.
On both sites we have build 6119 installed.

In the logs I have found the following error:

[15:09:09:475]|[02-13-2022]|[ADSLogger]|[INFO]|[105]:  |

com.manageengine.ads.fw.mobile.mpns.ApnsClientProvider$CommunicationException: java.lang.Exception: io.netty.handler.codec.DecoderException: javax.net.ssl.SSLException: Received fatal alert: certificate_expired

                at com.manageengine.ads.fw.mobile.mpns.IOSPushNotification.lambda$sendNotification$2(IOSPushNotification.java:147)

Has the certificate for the connection with the iOS-push-service expired?
How can I renew it?

Thanks in advance!

Wolfgang