Web access error / Device not authorised


I’ve searched but haven’t found similar topic.

When I try to access my cloud with Safari or Chrome (files.mycloud.com) and after login when the page with folders and files should be loaded, I keep getting the same error (error is in portuguese):

“Its not possible to connect to {0}
You are not authorized to access this device
Notify the owner of the device (or the user admin)”

I’m the admin and cant figure it out… Im able to access with mobile phone and local network with same macbook.