What happens when you ckick on the leftmost button ?
Any error in the browser console ?
Any error in projeqtror log file ?

What happens when you ckick on the leftmost button ? ==> Nothing

Any error in the browser console ? ==> no error, only warning : 
"Échec du chargement pour l’élément dont la source est « https://projeqtor.dev.ifce.fr/external/chartJS/dist/chart.min.js »
L’utilisation d’XMLHttpRequest de façon synchrone sur le fil d’exécution principal est obsolète à cause de son impact négatif sur la navigation de l’utilisateur final. Consulter https://xhr.spec.whatwg.org/#sync-warning pour plus d’informations."

Any error in projeqtror log file ? ==> No error

Do you have pop-up blocker ?

I don't have any blocker.
The issue exists on Firefox, Chrome and Edge on my computer but not only.

If it happens on all browsers, it can't actually be an extension or ad blocker problem...

but maybe a problem with your antivirus? Have you tested by disabling web monitoring?
Have you checked if there are loading restrictions on your web servers?

Hi,

I don't know where is the issue, but it seams to be only on my PC.
When I copy the link, and past it in the brother, I can download the files.

So I close this issue

Thank you for all

Eric