Using multiple modifier keys with the USB Rubber Ducky

[c47s]

I am getting this error

Error on line 0 : Error parsing duck_text: b'GUI H'

Which seems to refer to this line of DuckyScript

SHIFT GUI H

When encoding with https://ducktoolkit.com/encode.

I am trying to get the keystroke ⇧⌘H (SHIFT–COMMAND–H). It seems that this is a problem with multiple modifer keys.

What am I doing wrong, and how can I do it right in the future?