Please check your connection speed – a minimum of 4mb/s bandwidth is required to view. SpeedTest is a handy tool for this.
Also, be aware of the usage of devices on your network. If other people on your network are streaming/gaming, this may affect the amount of bandwidth available to you.
An attempt to use a VPN can also cause buffering – VPNs are prohibited and if detected your access to the stream will be revoked and no refund given.