Fatal error with PopOver plugin activate error

HI there, when activating the Pop Up plugin I get a blank screen with the following:

"Fatal error: func_get_args(): Can't be used as a function parameter in /home/k1ckitg00d/public_html/wp-content/plugins/popover/inc/external/wpmu-lib/functions-wpmulib.php on line 741"

I have deleted and re-installed but still get the error when I try to activate.

Can you help please

Thanks
Guy