I turned on PHP to show error reporting and debug yesterday but got nothing 
Turned on both again for you:
define( âWP_DEBUGâ, true );
define( âWP_DEBUG_DISPLAYâ, true );
There are some other errors on the shop single page about not getting the id directly so maybe look at that also. Plus some errors with my code which I must still fix.
This error is my code because I am passing the dc:product id which is working but still gives the error which is odd. But I think it the ID was called incorrectly is fixed my error would go away.
Replaced my domain with xxx
Notice : Trying to access array offset on value of type null in /home/urchinwe/xxx/wp-content/themes/pro-child/functions.php on line 106
The below error is calling the product id using a default dc for the product id.
Notice : ID was called incorrectly . Product properties should not be accessed directly. Backtrace: require(âwp-blog-header.phpâ), require_once(âwp-includes/template-loader.phpâ), include(â/themes/pro/cornerstone/includes/views/theming/layout-single.phpâ), do_action(âcs_layoutâ), WP_Hook->do_action, WP_Hook->apply_filters, CS_Action_Defer->__call, Themeco\Cornerstone\Elements\Renderer->renderRegion, Themeco\Cornerstone\Elements\Renderer->renderElements, Themeco\Cornerstone\Elements\Renderer->renderElement, Cornerstone_Element_Definition->render, Cornerstone_Element_Definition->render_one, x_element_render_section, cs_render_child_elements, do_action(âx_sectionâ), WP_Hook->do_action, WP_Hook->apply_filters, Themeco\Cornerstone\Elements\Renderer->renderElements, Themeco\Cornerstone\Elements\Renderer->renderElement, Cornerstone_Element_Definition->render, Cornerstone_Element_Definition->render_one, x_element_render_layout_row, cs_render_child_elements, do_action(âx_layout_rowâ), WP_Hook->do_action, WP_Hoo in /home/urchinwe/xxxx/wp-includes/functions.php on line 5535