Docker workflow export - error (de.NBI/CIBI Contributions)


Hi Folks,
Using the de.NBI/CIBI Contributions docker exporter I am getting the following error, on checking the log file (view/knime log) it doesnt tell me anything more. I have ran knime as sudo as suggested, i have also followed the advice from Export workflow into docker who had a similar problem.
I’m running ubuntu 18.04, is there anybody who could help out with this one, it would be much appreciated. Even an explanation of what ‘org.apache.cxf.jaxrs…’ interaction is with the workflow docker export would be useful.

ERROR DockerExportWizard KNIME project could not be exported.
Reason: Export of workflows did not succeed: java.lang.ClassNotFoundException: org.apache.cxf.jaxrs.client.spec.ClientBuilderImpl cannot be found by de.nbi.cibi.docker_1.0.0.201806221309