If you customized the HTML mail content, you must update them to use HTML::Template variables (this was changed to fix XSS injections).
For session variables, replace for example ``$cn`` by ``<TMPL_VAR NAME="session_cn" ESCAPE=HTML>``, and for other variables, replace for example ``$url`` by ``<TMPL_VAR NAME="url" ESCAPE=HTML>``.
Client Credential sessions missing expiration time
Client Credential sessions missing expiration time