"Hi, thanks for your response. As you can see in the attached file, I tried it earlier and got an error message. Have no idea ..."

"Jpeg/png files. I did publish with a new name, and published to a new location - It didn't help. What do you mean by "delete the publish..."

"Hi Nejc! I Added a blank slide as a first slide as you suggest, and unfortntally I still got the black canvas with the play but..."