This error usually comes when the block that was put in the text version does not have any content which is why system is returning the error, so either you can remove the block from the template and recreate the delivery or add data in the text block to use so it will not display the same error again.
This error usually comes when the block that was put in the text version does not have any content which is why system is returning the error, so either you can remove the block from the template and recreate the delivery or add data in the text block to use so it will not display the same error again.