[iOS] Calibre companion connection

Bonjour,

I read faq on this subject and I can't solve the problem :
On iPhone or iPad is the same.
- I try automatic connect
- Then with the IP and port formular filled

The starting initial sync start and disconnect after 15 seconds.
I verify firewall of computer on windows 10 but I don't know what file of calibre I have to authorize. Is it the problem ?

Thank you.