Why does my internet keep disconnecting?

[Android Central Question]

I have a ZTE N9560 running Android 7.1.1 and the internet keeps disconnecting and reconnecting. While it's disconnected it says that it's saved and then automatically reconnects after less than 15 seconds. People say to go to Wi-Fi then advanced and turn off a setting but I don't have that option. All I can press is Install Certificates, Wi-Fi Direct, WPS Push Button, WPS Pin Entry, or Passpoint. Help is greatly appreciated, thank you.

 

[B. Diddy]

Welcome to Android Central! Does this happen on any wi-fi network, or just your home network?