Get this error when run Package Control: Install Package:

The status bar shows "Loading repositories" for a while and popup this message box.

I install the Package Control by coping files. And it works well last time. I think its the network connection problem but don't know which step cause the problem.

When running Package Control: Discover Packages I found the url https://packagecontrol.io/#discover can not load in browser. It may be the problem.

The Package Control system depend on this website: packagecontrol.io. Just wait the site goes back online and try again. I found everything is Ok when the site is accessible.