OpenLDAP No such object (32)
Solution 1:
You need to find out what backend databases you have configured:
ldapsearch -H ldapi:/// -Y EXTERNAL -b "cn=config" -LLL -Q "olcDatabase=*" dn
The one you're looking for could be BDB, HDB or MDB.
(EDIT : one more /)
Solution 2:
Perhaps your second configured database isn't of the type bdb. For instance, CentOS 7 uses hdb by default.
dn: olcDatabase={2}hdb,cn=config