SOAP-ERROR: Encoding: Violation of encoding rules

Hi,

since today I get the error “SOAP-ERROR: Encoding: Violation of encoding rules” when trying to create a label. I attached an anonymized error log. I already tried to disable the majority of all other plug ins, that didn’t help. I use the latest version of WP, WC and DHL for WC.
Could you please help, we are really stuck. I can also provide credentials for my side if required.

Thanks!
Best,
Georg

09-23-2019 @ 14:25:00 - GET URL: https://cig.dhl.de/services/production/rest/checkout/60326/availableServices?startDate=2019-09-24
09-23-2019 @ 14:25:00 - GET Response Code: 200
09-23-2019 @ 14:25:00 - GET Response Body: stdClass Object
(
    [preferredLocation] => stdClass Object
        (
            [available] => 1
        )

    [preferredNeighbour] => stdClass Object
        (
            [available] => 1
        )

    [preferredDay] => stdClass Object
        (
            [available] => 1
            [validDays] => Array
                (
                    [0] => stdClass Object
                        (
                            [start] => 2019-09-26T00:00:00.000+02:00
                            [end] => 2019-09-26T23:59:59.999+02:00
                        )

                    [1] => stdClass Object
                        (
                            [start] => 2019-09-27T00:00:00.000+02:00
                            [end] => 2019-09-27T23:59:59.999+02:00
                        )

                    [2] => stdClass Object
                        (
                            [start] => 2019-09-28T00:00:00.000+02:00
                            [end] => 2019-09-28T23:59:59.999+02:00
                        )

                    [3] => stdClass Object
                        (
                            [start] => 2019-09-30T00:00:00.000+02:00
                            [end] => 2019-09-30T23:59:59.999+02:00
                        )

                    [4] => stdClass Object
                        (
                            [start] => 2019-10-01T00:00:00.000+02:00
                            [end] => 2019-10-01T23:59:59.999+02:00
                        )

                    [5] => stdClass Object
                        (
                            [start] => 2019-10-02T00:00:00.000+02:00
                            [end] => 2019-10-02T23:59:59.999+02:00
                        )

                )

        )

    [preferredTime] => stdClass Object
        (
            [available] => 1
            [timeframes] => Array
                (
                    [0] => stdClass Object
                        (
                            [start] => 18:00
                            [end] => 20:00
                            [code] => 031
                        )

                    [1] => stdClass Object
                        (
                            [start] => 19:00
                            [end] => 21:00
                            [code] => 032
                        )

                )

        )

    [inCarDelivery] => stdClass Object
        (
            [available] => 1
        )

    [sameDayDelivery] => stdClass Object
        (
            [available] => 1
            [sameDayTimeframes] => Array
                (
                    [0] => stdClass Object
                        (
                            [start] => 18:00
                            [end] => 20:00
                            [code] => 031
                            [DenselyPopulatedAreaId] => 600
                            [DenselyPopulatedAreaName] => Frankfurt
                            [deliveryBaseId] => F-ROE
                        )

                    [1] => stdClass Object
                        (
                            [start] => 19:00
                            [end] => 21:00
                            [code] => 032
                            [DenselyPopulatedAreaId] => 600
                            [DenselyPopulatedAreaName] => Frankfurt
                            [deliveryBaseId] => F-ROE
                        )

                )

        )

    [noNeighbourDelivery] => stdClass Object
        (
            [available] => 1
        )

)

09-23-2019 @ 12:25:08 - "createShipmentOrder" called with: Array
(
    [Version] => Array
        (
            [majorRelease] => 2
            [minorRelease] => 2
        )

    [ShipmentOrder] => Array
        (
            [sequenceNumber] => 28000
            [Shipment] => Array
                (
                    [ShipmentDetails] => Array
                        (
                            [product] => V01PAK
                            [accountNumber] => 63***01
                            [shipmentDate] => 2019-09-23
                            [ShipmentItem] => Array
                                (
                                    [weightInKG] => 1
                                )

                            [Notification] => Array
                                (
                                    [recipientEmailAddress] => **@**.de
                                )

                        )

                    [Shipper] => Array
                        (
                            [Name] => Array
                                (
                                    [name1] => ****
                                    [name2] => ****
                                )

                            [Address] => Array
                                (
                                    [streetName] => ****.
                                    [streetNumber] => ****
                                    [zip] => ****
                                    [city] => ****
                                    [Origin] => Array
                                        (
                                            [countryISOCode] => DE
                                            [state] => Deutschland
                                        )

                                )

                            [Communication] => Array
                                (
                                    [phone] => ****
                                    [email] => ****
                                )

                        )

                    [Receiver] => Array
                        (
                            [name1] => ****
                            [Address] => Array
                                (
                                    [streetName] => ****.
                                    [streetNumber] => ****
                                    [zip] => ****
                                    [city] => ****
                                    [Origin] => Array
                                        (
                                            [countryISOCode] => DE
                                        )

                                )

                            [Communication] => Array
                                (
                                    [phone] =>  
                                    [email] => ****
                                )

                            [Postfiliale] => Array
                                (
                                    [postNumber] => 
                                )

                        )

                )

            [labelResponseType] => B64
        )

)

09-23-2019 @ 12:25:08 - Response Error: SOAP-ERROR: Encoding: Violation of encoding rules