>> Redirect after restauration

I format my server, after create domain save with plesk (under cent OS 7)
I restaure domain but 2 multisite loops and get for the two domains this :
domain.com//wp-signup.php?new=domain.com
All data are there but always loop to this and I dont know why !
Have you got an idea why it redirect all the time ?
your help will be very appreciated
Thank you