Fatal error when exporting articles

Hello,

I get a fatal error when I try to export wordpress articles. It is weird as this bug appears only when I try to export articles. Exports of pages or users work well. Could you help please?

Thank you!

Fatal error: Uncaught exception ‘Exception’ in /home/petitscote/www/wp-content/plugins/wp-all-export/models/model/record.php:78 Stack trace: #0 /home/petitscote/www/wp-content/plugins/wp-all-export/models/model/record.php(114): PMXE_Model_Record->insert() #1 /home/petitscote/www/wp-content/plugins/wp-all-export/controllers/admin/export.php(384): PMXE_Model_Record->save() #2 /home/petitscote/www/wp-content/plugins/wp-all-export/wp-all-export.php(410): PMXE_Admin_Export->options() #3 [internal function]: PMXE_Plugin->adminInit(”) #4 /home/petitscote/www/wp-includes/class-wp-hook.php(286): call_user_func_array(Array, Array) #5 /home/petitscote/www/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(”, Array) #6 /home/petitscote/www/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #7 /home/petitscote/www/wp-admin/admin.php(156): do_action(‘admin_init’) #8 {main} thrown in /home/petitscote/www/wp-content/plugins/wp-all-export/models/model/record.php on line 78