ADDriver shutdown with error LDAP_OPERATIONS_ERROR



I have IDM 4.8.1 with ADDriver running.

The driver shut down unexpectedly and the following error is seen in the trace file: LDAP_OPERATIONS_ERROR

Here details of the driver trace:

Before that, there was an event on the publisher channel but the driver veto it. (That's fine because the driver has a rule to "veto" events on the publisher channel)

Does anyone know the cause of this error?