قبل از این مشکل من nginx رو با yum ، اینستال کردم . همین طور
engintron رو هم فقط اینستال کردم که در مرحله پایانی با زدن bash engintron.sh install به مشکل خوردم و این مشکل ایجاد شد .
الانم کلا پکیج engintron رو هم remove کردم .
این هم نتایج مطالبی که گفتید:

[root@aban ~]# yum clean all
Loaded plugins: fastestmirror, rhnplugin, universal-hooks
This system is already registered. Use --force to override
There was an error communicating with CLN.
CLN support will be disabled.
Error communicating with server. The message was:
Unable to connect to the host and port specified
Cleaning repos: EA4 cpanel-addons-production-feed addons base cl-ea4
: cloudlinux-base cloudlinux-imunify360 epel extras jetapps nginx
: update
Cleaning up Everything
Cleaning up list of fastest mirrors

[root@aban ~]# yum update
Loaded plugins: fastestmirror, rhnplugin, universal-hooks
This system is already registered. Use --force to override
There was an error communicating with CLN.
CLN support will be disabled.
Error communicating with server. The message was:
Unable to connect to the host and port specified
Setting up Update Process
Determining fastest mirrors
Could not retrieve mirrorlist http://httpupdate.cpanel.net/ea4-c6-x86_64-mirrorlist error was
14: PYCURL ERROR 7 - "Failed to connect to 224.0.0.2: Connection refused"
Error: Cannot find a valid baseurl for repo: EA4