Hi, What's the LED status on the plugs when problem happens? Are you using local internet connection? Make sure your host network is reliable. Use fixed channel and security type AES. Check firmware...

For some models, remote controll will be enabled automatically and it will not show up and you cannot disable it. To verify whether remote control is really turned on, use your mobile data to sign in...

Yes reset then configure it again is the only way.

You installed the correct plugin? https://www.tp-link.com/en/faq-1240.html How about try another computer?

Hi, Try format the SD card?

Hi, Is firmware latest? May contact tplink support for a solution.