Well if I understand the Cloud Editor : first activity is verifying the sketch - the green pushbutton with check mark,.Next- if sketch is positively verified - is compilation with uploading binary code to the board - this is after pushing the green button with arrow.
In my case, after pushing first button - nothing happens, same as after pushing this second button.
I was expecting some information, as with my two previous NANO 33IOT boards
So this is the reason that the compilation is rejected at the early stage without any information. Looks like Cloud Editor is not recognising my sketch.
Stan