The Eventbuilder theme and tickera plugin customized to display tickera button on front end(As display on the screenprint - Frontend.jpg ). It will help user to use your customized ticket to user and well with the shortcodes. Replace and upload below files with respective attached file on here to display the result. Also provided screen short for your reference.
These are the file and respective lines updated
\wp-content\plugins\tickera-event-ticketing-system\tickera.php - line 1971
\wp-content\plugins\tickera-event-ticketing-system\includes\classes\class.shortcode_builder.php - line 28
\wp-content\themes\EventBuilder\templates\template-upload-event.php - line 614 ('media_buttons' => true,)