Hi,
I also run into this Problem right now but i figured out what the problem was.
As i had many hacking attempts from France i blocked france in the county block list.
After that, no updates from CWP and also i couldn't load the mod_security module from inside the admin Panel.
As it was the last thing i changed, i removed FR from the list, and everything is working again.
So i checked the ip of centos-webpanel.com and recorgnized it is in france
So this explains a lot.
Maybe this could help if someone will have the same problem in the future.