The READ_ONLY_ROUTING_URL '%1!s!' specified for availability replica '%2!s!' is not valid. It does not follow the required ...

The READ_ONLY_ROUTING_URL '%1!s!' specified for availability replica '%2!s!' is not valid. It does not follow the required format of 'TCP://system-address:port'. For information about the correct routing URL format, see the CREATE AVAILABILITY GROUP documentation in SQL Server Books Online.