virtualmin nginx (111: Connection refused) while connecting to upstream

[looper200]

Hi,

First Thanks for virtualmin developers team,

I want to share this bug

2020/07/20 19:22:27 [error] 157783#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 188.xxx.xxx.xxx, server: www.******.net, request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:8001", host: "www.******.net", referrer: "https://www.*****.net/"

I got so many errors like this in the error log file
OS : centos 8.2
webmin : 1.953
virtualmin : 6.10
nginx : 1.14.1

Any suggestion to fix this problem please ?