Some plumbing problems definitely call for pro-grade expertise, but fixing a water shut-off valve leak isn’t one of them.
If your Samsung Washer looks like the one in the thumbnail, then this video will help you access all of the secret modes and ...
Download the release zip(on the right sidebar, do not click code..download as zip). Extract directly to your Ashita directory(the folder with ashita-cli.exe in it!). Everything should fall into place.