Revolution slider error

Hi,

I get a fatal error when trying to activate Revolution Slider
Parse error: syntax error, unexpected ‘[‘ in /hermes/bosnaweb12a/b963/ipg.coachingotgcom/wp-content/plugins/revslider/includes/framework/colorpicker.class.php on line 72

It just stopped working yesterday and I had to ask ipage support to deactivate it for me. What do I do now? All plugins are up to date.

Please help.

K