Not working – please help!

Using woocommerce Version 3.6.5
Blockonomics Version 1.7.7
Host: hostinger

My payments go through to blockonomics fine and the ‘order complete’ page comes up with all the right info.

But. No email is sent to the customer and the sale isn’t recorded on the site.
Emails are working on the site otherwise.
I disabled all plugins but still the problem persists.

I checked the error logs and I do have this:

order_key was called incorrectly. Order properties should not be accessed directly. Backtrace: require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), do_action(‘template_redirect’), WP_Hook->do_action, WP_Hook->apply_filters, WC_AJAX::do_wc_ajax, do_action(‘wc_ajax_checkout’), WP_Hook->do_action, WP_Hook->apply_filters, WC_AJAX::checkout, WC_Checkout->process_checkout, WC_Checkout->process_order_payment, WC_Gateway_Blockonomics->process_payment, WC_Abstract_Legacy_Order->__get, wc_doing_it_wrong. This message was added in version 3.0.

Any ideas? I’m quite stuck. I really like this plugin, it’s so perfect for what I want.

Any help at all would be greatly appreciated. Thanks!