PHP 7.1

Im getting an error and it is stopping me editing the page i’m working on, see below, i host on siteground and they have given me this message:

PHP Config
This tool will allow you to check if your website is compatible with the recommended by SiteGround PHP version and switch to it with a click. It is highly advisable to keep your WordPress running on the recommended PHP for best security and performance. Note that if you have a Multisite, changing the PHP version will affect all sites in your network.

Notice: checking your site for PHP 7.1 compatibility is a time consuming process that depends on the number of active plugins you have on your site. Please, don’t close your browser until the check is completed.

The following plugins/themes are not compatible with PHP 7.1.
Contact Form 7 SkinsSee Errors The7 Go Pricing – WordPress Responsive Pricing TablesSee Errors
If you have fixed the reported errors, you may try to check the PHP 7.1 compatibility of your WordPress site again.

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