Everything is in the title !
Hi @arnaudambro,
Thanks for your message!
Could you please tell me if you’re using MacOS Big Sur version? 
And can you confirm that it is working for images but not working for pdf files?
Thanks.
Hi @arnaudambro !
It seems to be a bug related to the MacOS version.
We create a ticket for it and it should be resolved soon, in the mean time please use another web browser