Do not call the listen function on the app object. Your express server will be configured to listen after a parse server instance is created.
If you are using a different template engine such as jade. This module will likely be referenced from your cloud > node_modules folder.
However at runtime, node.js will not be able resolve the jade module under your cloud > node_modules folder. To solve this,
navigate to app actions > environment variables and set the variable name "NODE_PATH" and the variable value "/bundle/cloud/node_modules".
When the "NODE_PATH" variable is set, node.js will resolve the jade dependency under your cloud > node_modules folder.