Camera dropped off

One of my cameras seems to have dropped off, it has a good signal to the module, but poor signal to the router, can any one advise please.

Move it closer to the router to test. If it works again, you may need to move your router or add a WiFi extender.

It works when closer to the router, I’m looking at getting a mesh system in place as I have a 1/2bar area near that camera and when the router has been rebooted the camera doesn’t pick up the signal.
Thanks for the reply.