My network extender is brand new as my other one ( a year old) was getting wonky. The new one goes through all of its stages successfully, however it now says Server Error 9A. Check Lan or firewall settings. Verizon suggested that I call TP link (My mesh router system company) or cox communication. TP link is not proving a solution and I am about to call Cox. Any suggestions here as my cell phone relies heavily on the extender. Thanks! Mark