We have just confirmed that the problem of not being able to connect to the Xenoverse server has been resolved.
When you connect to the server again, you will see the pop-up message ”Your data does not match the data on the Xenoverse server. Do you want to overwrite the save data on the server and start the game?", and if you press "Yes", you can take over the saved data you have been playing with. If you press "No", there is a possibility that you will not be able to transfer the saved data correctly.

We apologize for any inconvenience caused. Please continue to enjoy Xenoverse 2.

https://store.steampowered.com/app/2814240/DRAGON_BALL_XENOVERSE_2__FUTURE_SAGA_Chapter_1/