Travis CI build job status always job received from yesterday(2020 Dec 2nd). Why? And how to solve?

Our github project Nacos use CI to check build for a long time.
But from yesterday (2020 Dec 2nd), we found that all CI job is blocked and the job status is Job received like example.

I want to know why this problem occurs suddenly and how to solve it? Thanks.

same problem to me

Had restored now without any operation.