[2020] I have a problem, Matchmaking failed, return to menu.

When I try to enter in a match, it gives me this error has never happened before how can I fix it?


Matchmaking has failed. Return to the menu.

For more information, contact support.ubisof.com. [0007000005]
v70.287


I am playing on PC.
Yesterday the game was working perfectly, but today I don't know why it doesn't let me enter the game.
I can enter the main menu, but as soon as I try to enter the game it gives me this error.

EDIT:
It's been 30 minutes.
Now it's giving me this error.
[7-00000004]
v 70.287

EDIT2:
It's been an hour now, I'm trying to get into a game, it's giving me this error again.

Matchmaking has failed. Return to the menu.

For more information, contact support.ubisoft.com. [0007000005]
v70.287