3349007 - After updating the system PO Mail adapter is in error

You notice in the Communication Channel Monitor that channels using Mail Adapter are in error after startup. The Adapter can be started by opening NWA-> "Sart & Stop: Java Services" -> "Java Services" tab, in the "Service Component Name" search for "mail", and click on the row which says "com.sap.aii.adapter.mail.svc", and start/restart it using the button.

The Default Trace files contain the following error:

Application sap.com/com.sap.aii.adapter.mail.app cannot be started. Reason: it has hard reference to service com.sap.aii.adapter.mail.svc, which is not active on the server because service has failed to start. Contact component owners to investigate the problem with service com.sap.aii.adapter.mail.svc.
[EXCEPTION]
com.sap.engine.services.deploy.exceptions.ServerDeploymentException: Application sap.com/com.sap.aii.adapter.mail.app cannot be started. Reason: it has hard reference to service com.sap.aii.adapter.mail.svc, which is not active on the server because service has failed to start. Contact component owners to investigate the problem with service com.sap.aii.adapter.mail.svc.
    at com.sap.engine.services.deploy.server.LifecycleController.handleServiceNotAvailable(LifecycleController.java:507)
    at com.sap.engine.services.deploy.server.LifecycleController.startReferencedService(LifecycleController.java:471)
    at com.sap.engine.services.deploy.server.LifecycleController.startReferencedComponent(LifecycleController.java:210)
    at com.sap.engine.services.deploy.server.LifecycleController.startReferencedComponents(LifecycleController.java:179)

SAP PO 7.50, SAP PI 7.50

SAP PO 7.50, SAP PI 7.50, Mail adapter, patch, update, upgrade, Mail channel , KBA , BC-XI-CON-MAI , Mail Adapter , Problem