I don’t know why that happens and my internet connection is also very fine… I tried it more than 3 times and reloaded the builder again - but nothing changed.
Would it be possible to show the url instead of the question mark?
After I opened the “qr-code” (the question mark) on a new tab, I got the error message that the security certificate expired one day ago.
After marking it as “safe,” it works …
I use safari as Browser.