hehe
my bad
We're on Release leve: 8.0 SP1
Active software load 14.0.1.29
Inactive software loca 14.0.0.97
Platform: MXe-III
By the way, I did manage to solve the issue without having to use Firefox. Essentially, this is all a problem since the latest patch of Edge that forces IE to launch Edge when you open Internet Explorer (I am aware that you can add an exception, but the exception expired after 1 month). Well, I got rid of Edge and we put a block on our firewall so that IE cannot reach Internet.
There, I hate you even more today Microsoft.
Thanks for trying to help though ^_^