@WarrenBelz thank you for your direction.
I had tried this before, but to be sure.
I removed the flow connection (only one in project)
I deleted the 2 code references to this flow.
I saved the project, closed it, and reloaded.
I added the flow connection again via action x 2
Same error as screen shot above..
I saved a copy of this small subset app
I deleted everything I could, leaving 1 screen, 1 button, no other flows, connections, data, or customized settings for the App, Screen or button except Button.OnSelect simply does Set(link, BedlisttoSharepointforPrinting.Run("Hello").link);
Same Error as above
I created a fresh new app, added a button, added the action: Button.OnSelect simply does Set(link, BedlisttoSharepointforPrinting.Run("Hello").link);
This runs correctly without errors. Saved it, Exited, and export works fine.
Seems like I have accumulated some bad flow reference that doesn't appear to be user facing. This smaller subset app is easily recreated from scratch, but the bigger issues is the much larger parent app, from which this subset was copied, is having the same error and I am not excited about recreating that.