Hi Gaurav,
The problem you are facing right now is observed in some upgraded version.
Here are to steps to fix that issue:
1. Log into Gluu server container
2. mkdir /opt/gluu/jetty/identity/custom/pages/WEB-INF/incl/person/
3. cd /opt/gluu/jetty/identity/custom/pages/WEB-INF/incl/person/
4. wget https://github.com/GluuFederation/oxTrust/blob/version_3.1.3/server/src/main/webapp/WEB-INF/incl/person/personForm.xhtml
5. service identity restart
Thanks,
Gasmyr.