Clear Any Caching Plugin
Most of you probably have a caching plugin. Check the settings or menu bar and see if there is a “delete cache” button. I use the SG Optimizer plugin from Siteground they have a “Purge SG Cache” button in the menu bar.
Clear The CDN Cache
I use Cloudflare and it’s as simple as logging in, choose your domain, find the cache tab, and select “Purge All.”
Clear The Cache On Your WiFi Router
This may surprise you, but it’s possible that your local network is storing an old version of your site and is causing problems. Check your app or instructions online to clear that. (This cause is rare. I would check other things before bothering with this one.)