I was able to solve this by going into my PHP module settings. Please keep in mind that I had no idea what I was doing. Under CPanel > Select PHP Version, I changed the selected MYSQL modules on my shared hosting provider.
I received the errors when, under “M”, I had both “mysqli” and “mysqlnd” checked.
I toggled off both "mysql and “mysqlnd” and my WordPress and Matomo installations broke.
I toggled on, under “N”, “nd_mysqli”. It force checked, under “M”, “mysqlnd”. I left “mysqli” unchecked.
Both WordPress and Matomo responded again. All functionality returned to the Matomo dashboard (city block loaded, Admin > Diag worked).
