rijarob Thanks for the info.
Can you please open "Chrome" and again the Console.
Now please go to "Application".
Select now "Service Workser".
Do you see an entry? And If yes, which status does this entry have?
Now please click on "Unregister" at the top right.
Hit F5 in the browser and you should see again a service worker.
Now it should be shown as "Status activated and is running".
Try again if it is now working.