Octoprint control not sending script to pi

What is the problem?
I can't get a button to send a script to the pi

What did you already try to solve it?
I tried using command and also script
command: sends the script to the printer!
script: seems to do nothing

Logs (octoprint.log, serial.log or output on terminal tab at a minimum, browser error console if UI issue ... no logs, no support!)

terminal output if I use command:
Send: ~/scripts/SetLeds 1 1 1
Recv: echo:Unknown command: "~/scripts/SetLeds 1 1 1"
Recv: ok

Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible)
octoprint 1.4.0
octopi 0.17.0
Creality Ender-3
Raspberry pi 3B

yaml excerpt:

-   children:
    -   name: blue LED script
        script: ~/scripts/SetLeds 0 0 1
    -   command: ~/scripts/SetLeds 0 0 1
        name: blue LED command

buttons appear on the control page as expected
click the one marked "blue LED script"
nothing happens

click the one marked "blue LED command"
script is sent to the printer
(I guess that's to be expected)

but where does the "script" go?!?