New User Creation with LDAP broken with FrozenError

This is how it presents itself in the application_json.log file:

“message”:“(ldapmain) Authentication failure! ldap_error: FrozenError, can’t modify frozen String: ""”

Has any smart people on here seen this before? I’m kind of at a loss on this one because existing users can still sign in and perform work. I have updated this instance from 13.10.3 to 15.11.13.

Any Ideas?