Hi Marja,
I see that you tried to convert it to the two files system. And I see the still 503 error too.
I was going to suggest then you try forking the example and converting it to use your data so you can see when the Shiny dashabord breaks. (Or if it doesn’t break use the code.) However…
I see your fork of the example and the example itself failing to work right now. Albeit this is different than the error you are having. The shiny dashboard opens but it is darkened out and unable to be used.
So you could work on getting your fork to at least work with your code and data up to that point. Since the example has the problem and it hasn’t been changed in 20 days, I think it is something in the infrastructure that is out of the typical users hands that is causing the problem. Or it is my browser. Do you see the example failing to work too?