Cannot run workflow - "This check failed"

We have a job that will be run on our self-hosted machine, but today that job can’t be done. Github shows that “This check failed”. What does it mean?

We would create a self-hosted instance in one of our job and so we could use it in the next job. I find that it may be due to the reason that, when the next job is started, the instance isn’t registered yet(need around 2 minutes) and so it give out this error. However, the behaviour isn’t the same yesterday while the next job would wait until the instance created. Is there something changed? Thanks.