You can try and debug your application using a Sandbox. On the deploy tab, press the button Show debugger information. No in the modeller disconnect your debugger and connect is using the information show in the popup on the cloud portal.
Now you can debug your microflows using a sandbox environment.
Have you also configured your templates on the sandbox?
You can use the excel import function in the sandbox (Excel Importer module from the App Store) –
The problem was an confusing error message in the example import micoflow, the message reported problem with templates but is was problem in Java execution....