Re:HC site not browsing with "HCControlLibrary" loading error message.
This error could arise if you are not running HCAppPool under Integrated mode. So, kindly ensure that you change "Managed Pipeline Mode" from “Classic” to “Integrated” . Also, ensure that HC Database must be running with SQL_Latin1_General_CP1_CI_AS collation. If problem still persists then contact HC support department by opening a ticket with them.