Before fixing the issue, you must understand what is happening under the hood.
This error message typically indicates that the Kerio Control Web Filter cannot communicate with the categorization servers, or your license has expired . When this happens, the "Applications and Web Categories" tab often appears grayed out or shows as "not activated". Before fixing the issue, you must understand what
: Use Cloudflare (1.1.1.1) or OpenDNS (208.67.222.222) as custom DNS servers specifically for *.zvelo.com domains. Before fixing the issue