Stickup cam won't connect to wifi

My stickup cam has lost wifi connection for some reason. It was working just fine. Nothing has changed. In fact I have another wired stickup cam about the same distance from the router and it setup without an issue. I rebooted the router without success. I have tried the setup sequence several times with the same results, **it will NOT have my wifi network listed in the setup.** The cam is only about 20 feet from the router with NO walls in between. What to try?? Thanks in advance.