Spotlight cam and wifi extender

Hi there, Just wondering if anyone can help me. We have a doorbell, battery stick up and wired spotlight cam, all been working fine. However the spotlight cam and stick up is connected via a wifi extender as they’re outside. A few days ago the spotlight cam randomly disconnected and would not reconnect, however all the others stayed connected no problem. I’ve tried reconnecting it to the wifi extender like the stick up cam (wifi extender also) but it won’t let me, saying there’s a problem with the connection. It’s now currently connected to my main router however the signal is poor, hence the extender. I’ve tried rebooting via the app, set up pressing the button, reset holding for 15 secs, switching extender on and off, as well as router and camera at the plug but no joy. As you can imagine this is very frustrating especially when you have to climb a ladder to press the button every time! Find it very confusing when the others are working fine :( Thanks if anyone has any further advice