There is a yellow warning icon on the left of the primary node of my atlas cluster and I can't connect to it

There is a yellow warning icon on the left of the primary node of my atlas cluster and I can’t connect to it. But there is not even any alert information about how to solve it.

Hi @Guorui_Wang and welcome in the MongoDB Community :muscle: !

Is it still happening?

Could you please have a look to the project feed activity (top right corner) and tell me if you see some entries around the time of the incident?

Cheers,
Maxime.