Klap-in wrote
http://[wiki.urllink]/;jsessionid=D155B6DD9544E59516AC06A3B288FCB4?wicket:interface=:2:postback:postback::IFormSubmitListener::
jsessionid looks like Java. Do you maybe have a custom auth backend that authenticates against some Java webservice? That wicket:interface there seems to suggest
https://wicket.apache.org/ Definitely nothing a vanilla DokuWiki would do.