Tutorial10 was running fine yesterday, today it does not.

[Jeklah]

#![cfg_attr(feature = "stdsimd", feature(stdsimd))]

stdsimd is unknown feature.

I have tried deleting the repo and re-cloning hoping that I may have changed something while in the wrong directory, but it still gave the same error after recloning. I was looking at this repo most of yesterday and even up until bed, it was working no problem.

What's changed?