I don’t know how this could happen…
But I’ve tried on another computer and it worked fine!
Then I came back to mine and tried with other explorer and it worked…
(although it doens’t work with a ctrl+MAJ+N).
So… alternative solution, if anybody face it…
I suppose I’ll restart a new wordpress… Backup the website that are created and recreate them in a new network…
If anybody has an idea, I’m open.