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Fatal error: Uncaught Error: Call to undefined function wp_get_attachment_url() in /home/lextgwtg/homeworks.ng/wp-content/plugins/tutor/views/fragments/thumbnail-uploader.php:16 Stack trace: #0 {main} thrown in /home/lextgwtg/homeworks.ng/wp-content/plugins/tutor/views/fragments/thumbnail-uploader.php on line 16