here is the debug from this error and appears like the user has been created, but after that appears like Found Identifiers empty:
2020-02-20 05:36:41,793 DEBUG org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for interface= org.dspace.authenticate.AuthenticationMethod, class=org.dspace.authenticate.LDAPAuthentication
2020-02-20 05:36:41,793 DEBUG org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for interface= org.dspace.authenticate.AuthenticationMethod, class=org.dspace.authenticate.PasswordAuthentication
2020-02-20 05:36:41,793 INFO org.dspace.authenticate.LDAPAuthentication @ anonymous:session_id=AA19F8F0B656D7957DDCBF289B5FB261:ip_addr=186.154.35.180:auth:attempting trivial auth of user=hblancoc
2020-02-20 05:36:41,813 DEBUG org.dspace.authenticate.LDAPAuthentication @ anonymous:session_id=AA19F8F0B656D7957DDCBF289B5FB261:ip_addr=186.154.35.180:got DN:uid=hblancoca,ou=People,o=bog,o=
my.edu.co2020-02-20 05:36:41,815 INFO org.dspace.authenticate.LDAPAuthentication @ anonymous:session_id=AA19F8F0B656D7957DDCBF289B5FB261:ip_addr=186.154.35.180:autoregister:netid=hblancoca
2020-02-20 05:36:41,817 INFO org.dspace.eperson.EPersonServiceImpl @ anonymous:session_id=AA19F8F0B656D7957DDCBF289B5FB261:ip_addr=186.154.35.180:create_eperson:eperson_id=b2719981-6598-4d1a-bf1f-1cbc955aa0cd
2020-02-20 05:36:41,821 DEBUG org.dspace.identifier.IdentifierServiceImpl @ Found identifiers: []