When i am trying to install a vps i got this error
:::
::: You are root.
bash: line 108: whiptail: command not found
bash: line 111: whiptail: command not found
bash: line 114: whiptail: command not found
::: Cancel selected, exiting....
What VPS provider are you using, and what OS is installed on the VPS. Not having Whiptail tells me that it's not a Debian derivative. We may be able to get it installed, but it might take some work...
If you can get it installed, you can manually adjust the interface= value in /etc/dnsmasq.d/01-pihole.conf to use whatever interface you do have. Is it possible to install whiptail for the script to execute properly? Also, were you able to try the script in the link above?