Both Octoprint and my PC running Cura are plugged into the same Ethernet switch, & the web browser on the same PC was streaming the video from Octoprint just fine as that error has been generated, so I can guarantee you that it had absolutely nothing to do with IP connectivity between Octoprint and my PC. Just to double confirm this, I ran a continual ping as I generated the error, and my connectivity was 100% the whole time.
Yes, I have the Octoprint plugin Automatic Shutdown installed - however, even if I disable it, then restart both Octoprint and Cura, it still gives exactl