my Wi-fi does not connect after downloading iOS 13

Just find out the problem: There was an app named 1.1.1.1: Faster internet. A more private internet which claimed 44k satisfied people. I delete it and my wifi is bak.

Thanks both of you for you responses.

Resetting didn't work for me either. Spent several hours with 3 different Apple senior techs and they were unable to help.

I'll contact Apple support again today.

Thanks for your response