Experiencing a weird caching issues without any caching plugins

I figured it out. There’s a SiteGround Optimizer plugin that apparently does caching for the site. It’s bizarre. I deactivated the plugin, then reactivated it and all my changes appeared on the site when logged out. So weird.

404 Not Found

Not Found

The requested URL was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.