Error update HassOS from 3.5 to 3.7

I wanted to update ‘HassOS’ from 3.5 to 3.7.

But that can not be performed.
Any solution for that?
I have ‘’ on ‘proxmox’.


19-12-19 20:53:10 WARNING (MainThread) [hassio.hassos] Can't fetch versions from 

Same error. Hassio on RPI-2

Any luck with this one?

After few days the update worked for me…