Hi,
Sorry for the late reply.
I can see that you have shortcodes with the wcj_ prefix in your email – these shortcodes are from another plugin, you need to use our own shortcodes instead:
[order_number] instead of the [wcj_order_number], and
[order_details] instead of the [wcj_order_items_table].
Please give it a try and let me know what you think.