Wi-Fi is connected but the device shows "Wi-Fi has no internet access"
Try connecting other devices to the network - if they can connect to the internet, it might be a (strange) issue with your phone, possibly caused by the reconfiguration somehow - "forget" the network, and then reconnect to it. Otherwise, your router may not have or may not be providing internet access to devices on WiFi, also possibly caused by the reconfiguration somehow (however this one seems more likely).