When opening the Nintex Workflow designer within Office 365, there is a red bar displaying "Error Connecting to the Workflow Manager: undefined" or "Error Connecting to the Workflow Manager"
- Add the following to the trusted sites for the browser:
- Deactivate and Reactivate the "Workflow can use app permissions" site feature.
- Ensure the user account has the appropriate permissions to access the designer.
Contact Microsoft SharePoint Support to resolve the underlying connection error between the site and SharePoint Workflow Manager.