Publishing Storyline Content in Canvas LMS

This worked for me a couple of weeks ago but now I am adding a Storyline to a new course in Canvas and it keeps hanging - the player opens but that nothing else happens.  I have tried importing the new storyline into the player that I used originally but that hasn't helped either.

Any ideas or help would be gratefully received.

I just love Storyline and Canvas, it is shame we have so much bother trying to get them to work together.

Thanks.