Hello Trey,
Thank you for reaching out and I am happy to help!
As the notification states, the current db.php drop-in file is not a W3 Total Cache drop-in. This means that you are using another solution for DB caching besides W3 Total Cache.
To resolve this, please disable DB caching in the Performance>General settings, save all settings, and purge the cache, or if you want to use W3 Total Cache DB caching, disable the other plugin used for this, and delete the db.php file from the wp-content folder on your server.
Let me know if this helps!
Thanks!