installing backend service shows "sudo: once: command not found"

[baggiiiie]

below is my installation with curl https://get.once.com | sh

getting sudo: once: commnad not found error, though once seems to be installed successfully, as running once after the error worked

[baggie@host ~]$ curl https://get.once.com | sh
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  3732    0  3732    0     0   3867      0 --:--:-- --:--:-- --:--:--  3863
Installing once v0.1.3...
Installed once to /usr/local/bin/once
Installing background service...
sudo: once: command not found
[baggie@host ~]$ once

host info:

[baggie@host ~]$ cat /etc/os-release
NAME="Oracle Linux Server"
VERSION="9.6"
ID="ol"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"