After upgrade from 11.3RC2 to 11.3-RELEASE unable to activate LDAP directory service.

report_problem ValidationError
[EFAULT] ldap_update: option error

Error: Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/middlewared/plugins/ldap.py" , line 583, in do_update
await self.middleware.call( 'ldap.ldap_validate' , new )
File "/usr/local/lib/python3.7/site-packages/middlewared/main.py" , line 1127, in call
app=app, pipes=pipes, job_on_progress_cb=job_on_progress_cb, io_thread=True,
File "/usr/local/lib/python3.7/site-packages/middlewared/main.py" , line 1077, in _call
return await methodobj(*args)
File "/usr/local/lib/python3.7/site-packages/middlewared/plugins/ldap.py" , line 487, in ldap_validate
await self.middleware.call( 'ldap.validate_credentials' , data)
File "/usr/local/lib/python3.7/site-packages/middlewared/main.py" , line 1127, in call
app=app, pipes=pipes, job_on_progress_cb=job_on_progress_cb, io_thread=True,
File "/usr/local/lib/python3.7/site-packages/middlewared/main.py" , line 1091, in _call
return await run_method(methodobj, *args)
File "/usr/local/lib/python3.7/site-packages/middlewared/utils/run_in_thread.py" , line 10, in run_in_thread
return await self.loop.run_in_executor(self.run_in_thread_executor, functools.partial(method, *args, **kwargs))
File "/usr/local/lib/python3.7/site-packages/middlewared/utils/io_thread_pool_executor.py" , line 25, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/local/lib/python3.7/site-packages/middlewared/plugins/ldap.py" , line 636, in validate_credentials
ret = LDAP.validate_credentials()
File "/usr/local/lib/python3.7/site-packages/middlewared/plugins/ldap.py" , line 137, in validate_credentials
ret = self._open()
File "/usr/local/lib/python3.7/site-packages/middlewared/plugins/ldap.py" , line 197, in _open
ldap.set_option(ldap.OPT_X_TLS_NEWCTX, 0)
File "/usr/local/lib/python3.7/site-packages/ldap/functions.py" , line 103, in set_option
return _ldap_function_call(None,_ldap.set_option,option,invalue)
File "/usr/local/lib/python3.7/site-packages/ldap/functions.py" , line 55, in _ldap_function_call
result = func(args,*kwargs)
ValueError: option errorDuring handling of the above exception, another exception occurred:Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/middlewared/main.py" , line 130, in call_method
io_thread=False)
File "/usr/local/lib/python3.7/site-packages/middlewared/main.py" , line 1077, in _call
return await methodobj(*args)
File "/usr/local/lib/python3.7/site-packages/middlewared/service.py" , line 302, in update
f '{self._config.namespace}.update' , self, self.do_update, [data]
File "/usr/local/lib/python3.7/site-packages/middlewared/main.py" , line 1077, in _call
return await methodobj(*args)
File "/usr/local/lib/python3.7/site-packages/middlewared/schema.py" , line 960, in nf
return await f(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/middlewared/plugins/ldap.py" , line 585, in do_update
raise ValidationError( 'ldap_update' , str(e))
middlewared.service_exception.ValidationError: [EFAULT] ldap_update: option error