Reading notifications: An unexpected exception occurred during error processing

Hello SAP Launchpad service team, Hi Ramya Vasanth,

after the tip from Ramya to try again the Notification API I've tried to see the notification in the launchpad. But unfortunately it's not shown. In the Network tab of the developer tools I see a request to:

/v4/NotificationService.svc/Notifications?$expand=Actions,NavigationTargetParams&$orderby=CreatedAt%20desc&$filter=IsGroupHeader%20eq%20false&$skip=0&$top=10

which does return:

{
    "error": {
        "code": null,
        "message": "An unexpected exception occurred during error processing"
    }
}

Looking forward for a solution.

Best regards
Gregor