NHC2 not installing (manually and through hacs)

[Ynk84]

Hi, I've started a new installation of home assistant, with only Mosquitto broker, Visual studio code and Samba share installed.
First manually, with a copy of the nhc2 folder in the custom_components folder, and afterwards (with the manual copy of the folder removed) through hacs.
Both give the same message when adding the integration :
"Please wait while the integration is being installed."
This message doesn't change or disappear, even after a whole night running.

More info:
I've restarted homeassistant and the virtual machine to retry the installation, but no luck. (Before and after hacs installation of nhc2)
Just retried a total fresh install of the virtual machine, homeassistant and hacs with the same result.

Config :
Windows 10 Pro 20H2 and previous version
Virtual box 6.1
HA haos_ova-6.1 = 2021.7.3
HACS 2021.2.0
NHC version 1.6.0

[Ynk84]

seems to be the same as issue #22