When you are trying to add Gateway to PMS account and you get error: Whoops - Resource not found or no permissions. Server code: 6.

That means your Gateway is not online, there is no valid internet connection and in that case your LED lights will also not work properly. You can see it in App because it is visible over Bluetooth connection but can not be added.

To fix this connect your Gateway to internet connection and reset it, when LED lights are on (first 4 lights) that means you can add Gateway again.

You can find the image of the "Server code: 6" error at the following link: https://file.parklio.co/file/pgidpc905e2fe6c754c53bae6729d78a366f7

This kind of problem will be disabled in future so Gateway will not be visible if there is no internet connection.