HP iLO CPQCIDRV not found when module is loaded

Question

I'm trying to connect to the iLO interface on my HP ProLiant Server. I'm running Ubuntu 18.04 LTS

I've been following instructions including

• https://downloads.linux.hpe.com/SDR/project/mcp/
• https://www.vcloudnine.de/reset-the-hp-ilo-administrator-password-with-hponcfg-on-esxi/
• https://blog.tinned-software.net/set-the-ilo-password-from-linux-using-hponcfg/

When I install the hponcfg package and run the command hpilo, I get the following message:

HP Lights-Out Online Configuration utility
Version 5.3.0 Date 3/21/2018 (c) 2005,2018 Hewlett Packard Enterprise Development LP

ERROR: CpqCiCreateFunc() 0 time failed.
Driver Error Code:(1,1h).
Driver Error Message: CPQCIDRV driver is not loaded.

ERROR: CpqCiCreateFunc() 1 time failed.
Driver Error Code:(1,1h).
Driver Error Message: CPQCIDRV driver is not loaded.
ERROR:  Could not find the Management Processor Device Node.
        Please check if the iLO driver module is installed and running properly.
        ACTION REQUIRED: Install/Re-install hp Lights-Out driver package('hp-ilo' RPM) for iLO.

The output of lsmod | grep hpilo is: hpilo 20480 0

Do you have any ideas what might be the cause?

Thanks.