Problem to switch to fairphone open

I bought a FP2 in an orange store in FRANCE. I want to switch it to Fairphone open but I have a problem. I download and unzip
My computer works with ubuntu 16.04.
I turn off my FP2, turn on in fastboot mode.
I start the unix script,
I have the message:
benoit@yoga:~/Téléchargements/fp2$ ./
** Fairphone Open 18.01.1 Manual Flashing Script **

WARNING: Flashing this image wipes all user data and settings on the phone.

Validating files…
Validation complete.
And then nothing happen.
Thanks for ideas.

A post was merged into an existing topic: Open OS Manual Flashing Script does not work