Problems after installation

I have installed the WHMCS bridge today but i can’t seem to get it working.
Below is the debug log. Can someone point me in the right direction.

Debug Log
19:31:10: 512

HTTP Error:56/Failure when receiving data from the peer at http://www.xxxx.co.uk/customer/index.php?systpl=portal
19:31:10: Debug

CURL call: http://www.xxxx.co.uk/customer/index.php?systpl=portal with Array ( )
19:31:10: Debug

Headers: – Disposition:
19:29:49: 512

HTTP Error:56/Failure when receiving data from the peer at http://www.xxxx.co.uk/customer/index.php?systpl=portal
19:29:49: Debug

CURL call: http://www.xxxx.co.uk/customer/index.php?systpl=portal with Array ( )
19:29:49: Debug

Headers: – Disposition:
19:29:00: 512

HTTP Error:56/Failure when receiving data from the peer at http://www.xxxx.co.uk/customer/index.php?systpl=portal
19:29:00: Debug

CURL call: http://www.xxxx.co.uk/customer/index.php?systpl=portal with Array ( )
19:29:00: Debug

Headers: – Disposition:
19:28:52: Debug

https://ww.wp.xz.cn/plugins/whmcs-bridge/