[ Solved ] : hudson.remoting.ProxyException: io.fabric8.kubernetes.client.KubernetesClientException: No httpclient implementations found on the context classloader, please ensure your classpath includes an implementation jar

With this error: hudson.remoting.ProxyException: io.fabric8.kubernetes.client.KubernetesClientException: No httpclient implementations found on the context classloader, please ensure your classpath includes an implementation jar 

You can resolve by install this plugin : Pipeline: GitHub Groovy Libraries .

Finish !