First things first: you need to properly setup your dashboard:
This means that in the 'Application settings' area of the panel for your Web app, you need to go into the 'Connection strings' setting and add blob storage connection strings with the names 'AzureWebJobsDashboard' and 'AzureWebJobsStorage', with a type of 'Custom'.
Second: if you have continuous web jobs associated with a Web app, you need to ensure that the Web app setting 'Always On' is toggled *on*.
