Why my jupyter notebook could not open properly?

I have run my jupyter notebook in the remote server properly for a long time.Recently ,the Internet was crushed somehow,but I have reconnected all of them.
Then I ran the "screen -S jupyter"to detach it in the backstage.
And I ran the "sudo jupyterhub -f /etc/jupyterhub/jupyterhub_config.py"as usual.
and it looks like no error was found,but I couldn’t open it at home.It looks like the icon of “Home” was worked ,but nothing comes out for a long time.
Could anyone please help me?i couldn’t find any clue.
Thanks a lot.