Trying to build my docker image into a docker registry and I get this

net.sf.json.JSONException: A JSONObject text must begin with '{' at character 0 of
at net.sf.json.util.JSONTokener.syntaxError(JSONTokener.java:499)
at net.sf.json.JSONObject._fromJSONTokener(JSONObject.java:919)
at net.sf.json.JSONObject._fromString(JSONObject.java:1145)
at net.sf.json.JSONObject.fromObject(JSONObject.java:162)
at net.sf.json.JSONObject.fromObject(JSONObject.java:132)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryToken$1.call(DockerRegistryToken.java:91)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryToken$1.call(DockerRegistryToken.java:71)
at hudson.remoting.LocalChannel.call(LocalChannel.java:45)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryToken.newKeyMaterialFactory(DockerRegistryToken.java:71)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryEndpoint.newKeyMaterialFactory(DockerRegistryEndpoint.java:204)
at org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryEndpoint.newKeyMaterialFactory(DockerRegistryEndpoint.java:193)
at com.cloudbees.dockerpublish.DockerBuilder$Perform.executeCmd(DockerBuilder.java:458)
at com.cloudbees.dockerpublish.DockerBuilder$Perform.executeCmd(DockerBuilder.java:434)
at com.cloudbees.dockerpublish.DockerBuilder$Perform.buildAndTag(DockerBuilder.java:376)
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:779)
at hudson.model.Build$BuildExecution.build(Build.java:205)
at hudson.model.Build$BuildExecution.doRun(Build.java:162)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:534)
at hudson.model.Run.execute(Run.java:1720)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:404)
Build step 'Docker Build and Publish' marked build as failure