Persistant Public URL not working

Hello Team
I have the error while using Persistent public Url.
I have been using it for over 10 months now and no issues so far. But suddenly today, all public urls are not working, It shows that can not get in the screen when I click the public url.
Anybody can help me regarding this issue?
I get the public url after I created the HTTPS service and it worked well so far.

Sorry about the issue, we identified an issue with a recent upgrade and resolved it on our end.