"Logical Attribute: |enable| had error: java.lang.NullPointerException" error is due to corrupted password data of the user.
"Logical Attribute: |forcePasswordReset| had error: java.lang.NullPointerException"
Error is due to corrupted password data of the user.
Not all users are necessarily affected.
Clear the password data attribute of affected user(s) using JXplorer or a similar LDAP browser and then do Modify User.