When deploying an artifact to Websphere. The application is successfully stopped, but once the artifact tries to upload, the below error occurs:

Stopping Old Application 'XX'...
Updating 'XX' on IBM WebSphere Application Server
Error deploying to IBM WebSphere Application Server: org.jenkinsci.plugins.websphere.services.deployment.DeploymentServiceException: Failed to updated artifact: Failure uploading archive to server
at org.jenkinsci.plugins.websphere.services.deployment.WebSphereDeploymentService.updateArtifact(WebSphereDeploymentService.java:278)
at org.jenkinsci.plugins.websphere_deployer.WebSphereDeployerPlugin.updateArtifact(WebSphereDeployerPlugin.java:252)
at org.jenkinsci.plugins.websphere_deployer.WebSphereDeployerPlugin.perform(WebSphereDeployerPlugin.java:206)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:45)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:761)
at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:721)
at hudson.model.Build$BuildExecution.post2(Build.java:183)
at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:670)
at hudson.model.Run.execute(Run.java:1766)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:374)

As an FYI - i tried using plugin version 1..3.4 and the beta 1.4.

Our websphere keystore and truststore are stored as .p12 files. I tried using the .p12 files directly and also created a JKS file and converted them from pkcs12 to JKS format.