Zoefkids.nl

Hello everyone! I'm having a problem using Prestashop. After installing the G2APay module, i'm not able to acces my modules in the backoffice. When I try to acces the module section, I get a blank page reporting this error: [PrestaShop] Fatal error in module file :/var/www/vhosts/40/173192/webspace/siteapps/Prestashop-408838/htdocs/modules/g2apay/g2apay.php: syntax error, unexpected '[' As result of this error, I'm also not able to switch this module off. As a result of this problem, my hole webshop is totally useless at this moment. Can anyone please help me fix this problem?