Kasa reporting all devices offline or unavailable
We have a number of smart plugs and bulbs in the house. We use the Kasa app. Everything has worked faultlessly for a couple of years. Suddenly, all control has stopped working, for all devices, either locally or remotely. The devices are reported by Kasa as offline or unavailable. I have logged out, and back into, the app. I have turned off, and back on, the plugs. They appear to connect to wifi - green light - and can be turned on off via the switch on the plug. But the app has ALL of them greyed out. I have tried to contact TP Link but no one ever answers. Any advice please???
Desperate user and fan of TP Link