Disconnected by Server doing Final Breach Event

Dear team
my name is Ernesto and I am an italian Player - Steam Id ID team: 76561198021189255 BerenBarahir in game.
I was doing the Breach Event for the first time and I was fighting the final boss, dead 1 time
when I was immediately disconmnected by the server Today 20\02 11: 45 local time.

I connected again and I can not access anymore to the event, the gate is closed.
It means I lost 300 breachstones fragments, that you know hom many hours of gameplay it is and I feel very frustrated.

Can you please help me ?

Thanks in advance