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Are you sure it not returning no result? Does your DB has order from 2015? Also, I don't think your sql is correct try SELECT B.value AS "BARCODE", A.sku AS "SKU", A.name AS "NAME", A.price AS "PRICE", A.created_at AS "DATE" FROM `sales_order_item` AS A left JOIN `catalog_product_entity_varchar` AS B on A.`product_id` = B.`entity_id` WHERE (A.created_at LIKE "2021-11%" OR A.created_at LIKE "2021-12%") AND B.attribute_id = 88 GROUP BY A.sku ORDER BY `DATE` ASC
Is the user automatically log out when they click on the custom tab? It could be a PHP error that kills the cookie or custom code that logs the user out. Could you provide a little more info?
Just to make sure the API is working and the account contains orders. Have you tried to just query for the order_id to make sure it exists or all orders with status equal succeeded?
Make sure pub/static.php exist... then try http://connector/static.php?resource=/frontend/Magento/luma/en_US/css/print.css (see pub/static/.htaccess line #12)
