LDAP Error Java API

Hello, everybody

I’m getting an error when executing a script after a user task is complete. The problem is that I observe this behaviour in only one user, the other is not presenting the error. The error is in the following line in my javascript:

identityService.createUserQuery().memberOfGroup(groupName).list();

And the error description is:

Caused by: org.camunda.bpm.engine.impl.identity.IdentityProviderException: Could not query for users

javax.naming.NameNotFoundException: [LDAP: error code 32 - 0000208D: NameErr: DSID-031001E5, 
   problem 2001 (NO_OBJECT), data 0, best match of: '' ]; remaining name ''

Thank you