It has happened again and I've had enough. There is so much work involved in configuring all the devices etc. and overnight everything is gone. The network and the app are available with the TPLINK password: 12345678. I'm not the only one with this problem! You can see it here:

https://community.tp-link.com/en/home/forum/topic/617930

exactly the same ..and this has happened to me for the 3rd time!!! please fix this problem. the system is unusable like this. I expect a solution