Fatal error upon updating Boldgrid Inspirations plugin

Upon updating plugins for Boldgrid Inspirations and Contact Bank, the site in the link now displays the following error message:
Fatal error: Can’t use function return value in write context in /home/cassan12/mobile.cassandraulrich.com/wp-content/plugins/boldgrid-inspirations/includes/class-boldgrid-inspirations-config.php on line 188

Also, any clicks within my BoldGrid account produces the same error. How do I undo? What can be done if I can’t log into my account anymore?

The page I need help with: [log in to see the link]