ESXi stats intergration setup problem


I’ve been busy with a project that includes integrating ESXi stats.
I get this error while installing and configuring esxi_stats in home assistant:
2021-10-08 13:59:39 WARNING (MainThread) [homeassistant.config_entries] Config entry ‘’ for esxi_stats integration not ready yet: None; Retrying in background.

I filled out the credentials but I can’t get further than this error.

Host/vCenter: ESXi v7.0
Home Assistant Core Version: 2021.10.1

I tried contacting the owner, awaiting his reponse.