Setup Database and check connection

Hi the problem here are that you are using CodeIgniters built in Query Builder, and then trying to access the data with mysqli built in functions. You need to stick to CodeIgniters own function or switch over completely to mysqli_ functions.

Here are how you are supposed to fecth data:
https://codeigniter4.github.io/userguide...sults.html

PS. Moved your thread into CI 4 Support.