Insert (powerpoint etc.) photos doesn't work in Safari

When I press insert photos or powerpoint Prezi doesn’t response - there is no window on the right side, no option. I have Mac, It worked OK on PC. Do you have any advice, please?

I’m having the same issue with my MacBook Pro today. I’ve shut the Prezi program down and I’ve restarted my computer a few times, but I’m still having the same issue. In the past, I’ve just clicked “Insert” -> “Image”, but today the program seems uncooperative and nothing happens. Maybe the problem is at Prezi’s end? And hopefully it’s temporary!

Katerina, I kept searching online and found this response from Prezi support else posted recently: 
“We’re currently experiencing some issues with image insertion in Prezi Classic in Safari browser, our responsible team has been notified. In the meantime, a workaround can be to run Safari in unsafe mode, this article explains how to do this.”

Hope it helps you! I’m trying it now.

Update: Insert image works in Firefox, so I’m using that for now.