Here's the link to my own workflow: https://bit.ly/3sH84bD
It doesn't matter, it's my own workflow or any other, but Post notification windows doesn't work.
In case of my Caffeinate workflow, when you type "caff on", there will be just a sound, but previously, when it worked, it was showing a small window at the top right location of my screen.
MacOS 11.1
Alfred 4.3, build 1205.