Notice: product_type was called incorrectly

Not sure if this one is theme related but…

[06-May-2017 02:53:14 UTC] The WC_Product::get_price_excluding_tax function is deprecated since version 3.0. Replace with wc_get_price_excluding_tax.

More errors. can you not re-create these on your end. It shows up when debug is set to true.

Notice: product_type was called incorrectly. Product properties should not be accessed directly. Backtrace: require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), include(‘/themes/royal/woocommerce/single-product.php’), get_header, locate_template, load_template, require_once(‘/themes/royal/header.php’), wp_head, do_action(‘wp_head’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, Webdados_FB_Public->insert_meta_tags, WC_Product->__construct, WC_Product->get_type, WC_Abstract_Legacy_Product->__get, wc_doing_it_wrong Please see Debugging in WordPress for more information. (This message was added in version 3.0.) in /wp-includes/functions.php on line 4138

Notice: Undefined property: WC_Product::$product_type in /wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-product.php on line 139

Notice: product_type was called incorrectly. Product properties should not be accessed directly. Backtrace: require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), include(‘/themes/royal/woocommerce/single-product.php’), wc_get_template_part, load_template, require(‘/themes/royal/woocommerce/content-single-product.php’), previous_post_link_product, WC_Product->__construct, WC_Product->get_type, WC_Abstract_Legacy_Product->__get, wc_doing_it_wrong Please see Debugging in WordPress for more information. (This message was added in version 3.0.) in /wp-includes/functions.php on line 4138

Notice: Undefined property: WC_Product::$product_type in /wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-product.php on line 139

Notice: product_type was called incorrectly. Product properties should not be accessed directly. Backtrace: require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), include(‘/themes/royal/woocommerce/single-product.php’), wc_get_template_part, load_template, require(‘/themes/royal/woocommerce/content-single-product.php’), next_post_link_product, WC_Product->__construct, WC_Product->get_type, WC_Abstract_Legacy_Product->__get, wc_doing_it_wrong Please see Debugging in WordPress for more information. (This message was added in version 3.0.) in /wp-includes/functions.php on line 4138

Notice: Undefined property: WC_Product::$product_type in /wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-product.php on line 139

Notice: id was called incorrectly. Product properties should not be accessed directly. Backtrace: require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), include(‘/themes/royal/woocommerce/single-product.php’), wc_get_template_part, load_template, require(‘/themes/royal/woocommerce/content-single-product.php’), do_action(‘woocommerce_after_single_product_summary’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, woocommerce_output_product_data_tabs, wc_get_template, include(‘/themes/royal/woocommerce/single-product/tabs/tabs.php’), call_user_func, comments_template, require(‘/themes/royal/woocommerce/single-product-reviews.php’), WC_Abstract_Legacy_Product->__get, wc_doing_it_wrong Please see Debugging in WordPress for more information. (This message was added in version 3.0.) in /wp-includes/functions.php on line 4138

Strict Standards: Declaration of MH_Table_Rate_Plus_Shipping_Method::calculate_shipping() should be compatible with WC_Shipping_Method::calculate_shipping($package = Array) in /wp-content/plugins/mh-woocommerce-table-rate-shipping-plus/mh-wc-table-rate-plus.php on line 55

Have you tried to see if you see these errors when debug is set to true on your test site???