Hello!
We bring our apologies for this terrible inconvenience!
Please, edit file legenda/framework/options.php , find if($doshortcode){ (line 5) and replace by if($doshortcode && is_string(ot_get_option( $key,$setting ))){
if($doshortcode){
if($doshortcode && is_string(ot_get_option( $key,$setting ))){
Kind Regards