Syntax error

Hi,

I want to try this plugin one of my sites, and when I wanted to activate it I got this error message:

Parse error: syntax error, unexpected T_FUNCTION in /home/.../whmcs-integration.php on line 811

Do you have any idea?
Thansk a lot!
Robert

edit: this is the solution: https://premium.wpmudev.org/forums/topic/cant-activate-2#post-197921
Sorry for the topic...