ERROR 400: Unknown Error in ALERT

Hello I am just a beginner, Im using free version and I want to put Alert Feature but when I try to save It always says It cannot process my request and ERROR (400): Unknown Error

Is there any solution to this? I found an article here about using VPN but not sure if it will work.

Hi,

The alerts feature are not enabled at the public server, however if you are working with a thinger based device (so you can code it) you can walkaround it establishing a criteria at the device and unchaining actions based on configurable thresholds.

Hope this helps.