How to upgrade a Nintex for Office 365 workflow to Nintex Workflow Cloud that uses the action, Run Component Workflow.
You will want to ensure that the component workflow your parent workflow calls in Nintex for Office 365 is upgraded and published in your Nintex Workflow Cloud environment. Sometimes called site workflows, these can be found by going into the Nintex Workflow for Office 365 app under Site contents in your SharePoint site. This workflow will follow the same upgrade steps as other list or library workflows being upgraded.
The component workflow called by the parent workflow will be upgraded as a component workflow in Nintex Workflow Cloud and can be called by other workflows using the Call a workflow action. The start event will be set to Component workflow. It will no longer be a site workflow as found in Site contents from the context of Nintex for Office 365.