ERROR: Build step failed with exception
net.sf.json.JSONException: null object
at net.sf.json.JSONObject.verifyIsNull(JSONObject.java:2688)
at net.sf.json.JSONObject.element(JSONObject.java:1733)
at net.sf.json.JSONObject.element(JSONObject.java:1716)
at net.sf.json.JSONObject.put(JSONObject.java:2328)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryToken$1.call(DockerRegistryToken.java:154)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryToken$1.call(DockerRegistryToken.java:129)
at hudson.remoting.LocalChannel.call(LocalChannel.java:47)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryToken.newKeyMaterialFactory(DockerRegistryToken.java:129)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryEndpoint.newKeyMaterialFactory(DockerRegistryEndpoint.java:273)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryEndpoint.newKeyMaterialFactory(DockerRegistryEndpoint.java:258)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryEndpoint.newKeyMaterialFactory(DockerRegistryEndpoint.java:250)
at com.cloudbees.dockerpublish.DockerBuilder$Perform.executeCmd(DockerBuilder.java:457)
at com.cloudbees.dockerpublish.DockerBuilder$Perform.executeCmd(DockerBuilder.java:431)
at com.cloudbees.dockerpublish.DockerBuilder$Perform.buildAndTag(DockerBuilder.java:373)
at com.cloudbees.dockerpublish.DockerBuilder$Perform.exec(DockerBuilder.java:311)
at com.cloudbees.dockerpublish.DockerBuilder$Perform.access$100(DockerBuilder.java:291)
at com.cloudbees.dockerpublish.DockerBuilder.perform(DockerBuilder.java:262)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:816)
at hudson.model.Build$BuildExecution.build(Build.java:199)
at hudson.model.Build$BuildExecution.doRun(Build.java:164)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:524)
at hudson.model.Run.execute(Run.java:1899)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:44)
at hudson.model.ResourceController.execute(ResourceController.java:107)
at hudson.model.Executor.run(Executor.java:449)
Build step 'Docker Build and Publish' marked build as failure
Finished: FAILURE