This is in an on premises SharePoint 2013 instance.
I followed the directions for installing Nintex 2013 Workflows. Everything seemed to be fine.
I am following an example to create my first Nintex workflow (Think "Hello, World").
The workflow does not run.
Examining the services, I see that the Nintex Workflow Start Service is not currently running.
I attempted to just launch it and I received the above dialog message.
I have examined the Event log. All it says is "The Nintex Workflow Start Service service entered the stopped state."
Examining the ULS log and I see nothing referring to this. I do see the entering/leaving monitored scope for the (Timer Job Nintex Workflow Scheduler).
Originally it was running as "Local Service". I changed it to use an AD service account that has privileges to access the databases.
Thanks for your time.