Greetings.
From today I have problems with the tplink app to control 3 nc450 cameras. The app doesn't show me the cameras and asks me for the password. However, when you enter the password, it turns out to be invalid.
I tried to follow the reset instructions but there is something abnormal in the app. It does not work properly.
I deleted app cache and forced quit but nothing.
I reinstalled the app but nothing.
I reset the camera 50 times but nothing.
I can't see my cameras anymore.
The password reset does not happen when you hold down the reset button behind the camera for 5-10 seconds and the user and password admin admin do not work.

Furthermore, I can't connect to the telephone IP from the browser. I tried 4 browsers but the error it gives me is related to certificates:

ERR_SSL_VERSION_OR_CIPHER_MISMATCH

I don't know how to reset the cameras.
I ask for your help.