SleepWorker 1.2.3 not loading: "no longer compatible"

[Exaxxion]

Trying to use SleepWorker which is purportedly working as long as one uses the latest version:

However when I load the game I get this result:

[SMAPI] SMAPI 3.18.6 with Stardew Valley 1.5.6 (build 1.3.37.0) on Unix 5.15.0.86
[...]
[SMAPI]    PyTK Lite 1.24.0 by Platonymous | Platonymous Toolkit (Lite Version)
[...]
[SMAPI]    Skipped mods
[SMAPI]    --------------------------------------------------
[SMAPI]       These mods could not be added to your game.

[SMAPI]       - SleepWorker 1.2.3 because it's no longer compatible. Please check for a new version at https://smapi.io/mods