Esxi_hardware

Hello,
I am having problems with the check_esxi_harware.py script when executed on Dell servers with iDRAC9 and ESX 6.7
For other ESX 6.7 but with iDRAC8 the script is working.
./check_esxi_hardware.py -H *********** -U ***** -P **** -V dell -v
20200108 06:16:37 LCD Status: True
20200108 06:16:37 Connection to https://-----------------
20200108 06:16:37 Found pywbem version 0.7.0
20200108 06:16:37 Connection error, disable SSL certificate verification (probably patched pywbem)
20200108 06:16:37 Check classe OMC_SMASHFirmwareIdentity
UNKNOWN: (0, ‘Socket error: [Errno 111] Connection refused’)

./check_esxi_hardware.py -H ******** -U ******* -P ******* -V dell -v
20200108 06:16:43 LCD Status: True
20200108 06:16:43 Connection to https://------
20200108 06:16:43 Found pywbem version 0.7.0
20200108 06:16:44 Connection error, disable SSL certificate verification (probably patched pywbem)
20200108 06:16:44 Check classe OMC_SMASHFirmwareIdentity
20200108 06:16:44 Element Name = System BIOS
20200108 06:16:44 VersionString = 2.10.5
20200108 06:16:44 Check classe CIM_Chassis
20200108 06:16:45 Element Name = Chassis
20200108 06:16:45 Manufacturer = Dell Inc.
20200108 06:16:45 Model = PowerEdge R730xd

Do you have any idea what could be the problem?

Thanks,
Adrian