Authentication Server:Edit Policy prompt error when click

Hi All, i want to setup authentication server for ldap on SLES 12 SP1. however i failed to edit policy for password in YAST as per attachment. (as i need to setup policy eg: force user change password, password expiration etc)
1.can someone help on how to fix this bug and to manually change for password policy in command line


Internal error. Please report a bug report with logs.
Details: undefined method ‘Import’ for #Yast::LdapClass:0x00000000cb7398
Caller: /usr/share/YaST2/modules/ldapDatabase.rb:618:in 'DbPpolicyinput"



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