YunoHost 3.8 testing / Call for feedback

First thanks for al the work on yunohost it work really great for me.
Migration run smoothly.
Concerning the new diagnosis tool, It seems very interesting.

However, I tried the new xmpp http upload fonctionnality and it doesn’t work for me.
I first had an ssl error fixed by regenerating my letsencrypt certificate but now I can’t upload image with Dino, I get

“Error getting upload/download url (Error Iq)”

and when I use an other client like gajim, it upload but the download file is the nginx 404 not found page.

Thanks in advance.