Can you please check if you see any error in httpd logs (error or access) or “fwconsole debug”.
Please open Github issue to debug this further and you can try to see if 16.0.37 works fine or not for you ?
changelog shows below fixes after 16.0.36
16.0.38.2 Github issue#19 Improving reset password email template
16.0.38 FREEPBX-24070
16.0.37 FREEPBX-24083 ( ref - User disappears from contact list if they change their user info in UCP)