Error when validating and publishing from process-app in Activiti7.
After making any changes in the process diagram the process validate is not working and also unable to publish the app. No errors are getting reflected in the App, however when trying to use the Alfresco Process Services app to publish an app definition we get the following error:"Could not publish app definition. Check the validity of the referenced process models" .
The error I am getting in logs is : ERROR o.a.bpmn.converter.BpmnXMLConverter APS Error writing BPMN XML java.lang.NullPointerException: null
Has anyone experienced this before or can anyone provide any help to resolve it?