Receiving Fatal Error

When I am trying to activating the plugin I am receiving following error.

Parse error: syntax error, unexpected ‘[‘ in /home/content/87/9143387/html/Coin/wp-content/plugins/woo-escrow-gateway/woocommerce-gateway-escrow.php on line 442

At line 441-443 the code is

if (!isset($escrow_transaction_id) or $escrow_transaction_id <= 0) {
return [];
}