Closed Organization Policy
When creating an Org in Cliq, the Admin can disable the option of 'send requests through mail'. When this option is disabled the members who want to join the Org will not get the button to send a mail request to the Admin. Instead they will be told to contact their Admin directly. This is known as 'Closed Organization Policy'.
Therefore if you get the following screen then directly contact the Admin to join your company's Org in Cliq.