Cant update WP core

First time I've encountered this problem. Stuck! The WordPress is saying 4.96 is installed. And that it's the latest version of WordPress. No way to upgrade. Now I know 5.0 is available. I've been upgrading all my other sites.

Figured I'll try the manual way. I downloaded 5.0 and extracted it in the root directory. But the admin is still showing 4.9. I have Sucuri Firewall running and a caching plugin. I cleared cache on all multiple times and tried on different browsers. Still stuck at 4.9

How can I upgrade and/or have it show the correct version?