Cannot connect to server, likely due to this error message

I get the error repeated here multiple times already.

something went wrong. we could not make a connection with the server.

While trying to make any imports. I checked the error log in /wp-admin and this is the error being generated and probably the cause of the issue:

[30-Jun-2017 18:00:27 UTC] product_type was called incorrectly. Product properties should not be accessed directly. Backtrace: do_action('wp_ajax_woocsv_export'), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, Allaerd\Export\ajaxExport->start, Allaerd\Export\ajaxExport->exportProduct, WC_Abstract_Legacy_Product->__get, wc_doing_it_wrong. This message was added in version 3.0.

I found this relevant link but I do not know how to go about fixing the problem which might be that:

The product_type property is deprecated. Use get_type() to get internal type.

So you need to change this: $product->product_type; to this: $product->get_type();