Team Connection Issue (Tom Clancy's Rainbow Six: Siege)

Such a problem appeared after a month and a half of the normal operation of this whole case. Suddenly, from the whole team, now only one person can join everyone and, back, we, the rest, including me, now cannot connect to each other. Accordingly, without that guy we can't play together at all. I get an error with the number 68 at the end. sometimes 47. Nat is open for everyone. antiviruses are turned off, ports are open, support is silent and in general in the personal account the column "my questions" is for some reason empty, although I asked them twice. maybe some of you know how to fix this problem. what to do?