I have installed three 2-unit mesh networks - at 3 sites - using Deco S4s. The Deco app no longer 'sees' one of them, yet that network, like the others, is working fine. My iPhone does not see the Deco's internal network and if I enter the Deco's SSID in the "Other.." field, I get the response "Could not find the network Deco_279C". I need to set up a port forwarding entry but obviously cannot do so if I can't get into the thing. Any ideas?