parse error syntax error unexpected ' ' in wordpress

Just installed Shapely- then followed the instructions for “Getting Started” now I get

Parse error: syntax error, unexpected ‘[’ in /home/content/23/9646923/html/wp-content/plugins/shapely-companion/inc/widgets/widget-home-clients.php on line 84

when I try to do anything else. I can’t even move away from the “Welcome to Shapely” screen to get to the Editor!

Website url:


And now I can’t even log-in!