com.sun.xml.internal.ws.spi.db.DatabindingException: Unknown JAXBContext implementation: class com.sun.xml.bind.v2.runtime.JAXBContextImpl

Question

I am building a client for DHL (https://cig.dhl.de/cig-wsdls/com/dpdhl/wsdl/geschaeftskundenversand-api/3.1/). Its a SOAP API with an implicit soap header. I try to add the