Save Settings Button not working

settings are saved using JavaScript (AJAX), can you check for errors on the browser console before/ while/ after saving change fitsianfoodlife ?

How exactly do I do this?

What should I be looking for when I do this and what should I do if it doesn’t look like it’s working?

have a look at this article to learn how to see JavaScript errors on the console fitsianfoodlife ;
https://www.ads-software.com/support/article/using-your-browser-to-diagnose-javascript-errors/#step-3-diagnosis