Tried to export the Directory in CA IDM management console and change the LDAP url and then import it back to IDM. Getting the blank screen
Release : Identity Manager 14.3
This is due to F5 configuration
Under F5, Change the value of the variable avr.cspm.inject.location of "at_the_end" to "after_head"
https://support.f5.com/csp/article/K93701708