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https://stackoverflow.com/questions/32100021/cannot-login-to-oracle-enterprise-manager-express
https://support.oracle.com/knowledge/Oracle%20Database%20Products/1968763_1.html
https://community.oracle.com/thread/3696117
https://www.oracle.com/webfolder/community/enterprise_manager/3347571.html
http://jennifishfish.blogspot.com/2016/07/got-security-error-with-security-token.html
https://github.com/MaksymBilenko/docker-oracle-12c/issues/62
https://github.com/MaksymBilenko/docker-oracle-12c/issues/109
https://forum.joomla.org/viewtopic.php?t=950397
https://dba.stackexchange.com/questions/122807/oracle-12c-express-enterprise-manager-webpage-does-not-load
http://kyoukara20140123.hatenablog.com/entry/2017/01/08/200450
https://www.develop-bugs.com/article/19436551/Cannot+login+to+Oracle+Enterprise+Manager+Express
https://forums.cpanel.net/threads/the-security-token-is-missing-from-your-request.586402/
https://www.wikihouse.com/44maru/index.php?tech_memo%2FORACLE%2F12cR1