Export to CSV Error

  • When exporting the bookings for an event, if I include ticket name or description I get an error. The error shown in the CSV file is…

    Notice: Function convert_to_screen(), add_meta_box() was called incorrectly. Likely direct inclusion of wp-admin/includes/template.php in order to use add_meta_box(). This is very wrong. Hook the add_meta_box() call into the add_meta_boxes action instead. Please see Debugging in WordPress for more information. (This message was added in version 3.3.0.) in /home/dufour/P4ML4XO9/htdocs/wp-includes/functions.php on line 5835

    Any suggestions?

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