If you changed anything in your access point setup, you may need to reconnect to your WiFi network.
Even if your SSID or password did not change, it can still help to set it up again. Especially if you changed your hardware, but kept your SSID and password the same, you will have to search and connect to your WiFi again. This is due to the fact that WiFi does not only store your SSID but also the hardware id of your access point.