Suddenly rancher stops working

Hi,

While I am in working, suddenly rancher stops working. And I am getting the below error.
Error: 503 Service Temporarily Unavailable (nginx/1.13.12)

In logs it showing : Get https://10.43.0.1:443/apis/management.cattle.io/v3/authconfigs/local?timeout=30s: net/http: request canceled (Client.Timeout exceeded while awaiting headers)