Installation Errors Pulse 4.21.0

[Nytsam97]

I keep running into this error when following the default installation scrip on my PVE host.

I am using the recommended installer script

curl -fsSL https://raw.githubusercontent.com/rcourtman/Pulse/main/install.sh | bash

=================================================
           Pulse Installation Script
=================================================

[INFO] Installing dependencies...
[INFO] Creating pulse user...
[INFO] Setting up directories...
[INFO] Downloading Pulse...
[INFO] Latest version: v4.21.0
[INFO] Detected architecture: x86_64 (amd64)
[INFO] Downloading from: https://github.com/rcourtman/Pulse/releases/download/v4.21.0/pulse-v4.21.0-linux-amd64.tar.gz
/tmp/install.sh: line 1519: print_warn: command not found
root@pve-main:/tmp# 

This is the affected line in the script and I'm not sure what command it can't find

            print_warn "Docker agent binary not found in archive; skipping installation"