KotlinJS: Hot reload not working

So I’m just following the tutorial on https://play.kotlinlang.org/hands-on/Building%20Web%20Applications%20with%20React%20and%20Kotlin%20JS/03_A_First_Static_Page . Everything working fine but my chrome broswer won’t reload on change to code for some reason. I have my webdev server on. I have up-to-date everything and using Windows.