Please make sure that TypeSquare Desktop Manager is properly installed.
Please make sure that you are connected to the internet.
Please make sure that your username/account name and passwords are correct.
Please make sure that you are not signed in on another computer using TypeSquare Desktop Manager.
Please make sure that you are not logged into the OS using a different account while signing in with TypeSquare Desktop Manager.
Please make sure that your anti-virus softwares, firewalls, etc. are not interfering or not limiting your access to the internet.