Image Upload isn't working

Hello :) 

For 2 weeks now, we’re facing the same problem with our Typeforms: the image upload fails. 

The same error message is displayed : “An error occurred while uploading the file”.

Here is the link of our Typeform with this problem: 

Here is the file we’ve tried to upload: 

(no problem with the format or the size)

Can you please have a look and help us? :) 

Thank you in advance

Best