Here’s what I get when I put
<cfscript>
WriteOutput(cgi.http_referer)
Writedump(gethttprequestdata().headers.referer)
WriteOutput(server.lucee.version)
</cfscript>
"The key [referer] does not exist. Available keys are [accept, accept-encoding, accept-language, cdn-loop, cf-connecting-ip, cf-ipcountry, cf-ray, cf-visitor, connection, cookie, host, priority, sec-ch-ua, sec-ch-ua-arch, sec-ch-ua-bitness, sec-ch-ua-full-version, sec-ch-ua-full-version-list, sec-ch-ua-mobile, sec-ch-ua-model, sec-ch-ua-platform, sec-ch-ua-platform-version, sec-fetch-dest, sec-fetch-mode, sec-fetch-site, sec-fetch-user, upgrade-insecure-requests, user-agent, x-forwarded-for, x-forwarded-host, x-forwarded-proto, x-forwarded-server, x-modcfml-sharedkey, x-tomcat-docroot, x-webserver-context].;The key [referer] does not exist. Available keys are [accept, accept-encoding, accept-language, cdn-loop, cf-connecting-ip, cf-ipcountry, cf-ray, cf-visitor, connection, cookie, host, priority, sec-ch-ua, sec-ch-ua-arch, sec-ch-ua-bitness, sec-ch-ua-full-version, sec-ch-ua-full-version-list, sec-ch-ua-mobile, sec-ch-ua-model, sec-ch-ua-platform, sec-ch-ua-platform-version, sec-fetch-dest, sec-fetch-mode, sec-fetch-site, sec-fetch-user, upgrade-insecure-requests, user-agent, x-forwarded-for, x-forwarded-host, x-forwarded-proto, x-forwarded-server, x-modcfml-sharedkey, x-tomcat-docroot, x-webserver-context]. Only the following keys are available [ accept, accept-encoding, accept-language, cdn-loop, cf-connecting-ip, cf-ipcountry, cf-ray, cf-visitor, connection, cookie, host, priority, sec-ch-ua, sec-ch-ua-arch, sec-ch-ua-bitness, sec-ch-ua-full-version, sec-ch-ua-full-version-list, sec-ch-ua-mobile, sec-ch-ua-model, sec-ch-ua-platform, sec-ch-ua-platform-version, sec-fetch-dest, sec-fetch-mode, sec-fetch-site, sec-fetch-user, upgrade-insecure-requests, user-agent, x-forwarded-for, x-forwarded-host, x-forwarded-proto, x-forwarded-server, x-modcfml-sharedkey, x-tomcat-docroot, x-webserver-context ].;lucee.runtime.exp.ExpressionException: The key [referer] does not exist. Available keys are [accept, accept-encoding, accept-language, cdn-loop, cf-connecting-ip, cf-ipcountry, cf-ray, cf-visitor, connection, cookie, host, priority, sec-ch-ua, sec-ch-ua-arch, sec-ch-ua-bitness, sec-ch-ua-full-version, sec-ch-ua-full-version-list, sec-ch-ua-mobile, sec-ch-ua-model, sec-ch-ua-platform, sec-ch-ua-platform-version, sec-fetch-dest, sec-fetch-mode, sec-fetch-site, sec-fetch-user, upgrade-insecure-requests, user-agent, x-forwarded-for, x-forwarded-host, x-forwarded-proto, x-forwarded-server, x-modcfml-sharedkey, x-tomcat-docroot, x-webserver-context].