To work around this issue until the app is updated, it works if you update @Configuration( ) to @Configuration(local=True) in ldapsearch.py, ldapfetch.py, ldapfilter.py, ldapgroup.py, and ldaptestconnection.py.
If there were pre-existing settings in the parenthesis in @Connection( ), you can keep the pre-existing settings and add local=True - such as @Connection(local=True, retainsevents=True)
EDIT
The app now has a workaround for this in the form of a conf file:
https://docs.splunk.com/Documentation/SA-LdapSearch/2.1.4/User/Workaroundfordefaultconfigstanzaerrorsindistributedenvironments
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