| @@ -199,9 +199,9 @@ | ||
| 199 | 199 | * @return string |
| 200 | 200 | */ |
| 201 | 201 | public static function upgrade_condition( $conditions, $relation ) { |
| 202 | 202 | |
| 203 | - if ( ! $conditions || $conditions == '[]' ) { | |
| 203 | + if ( ! $conditions || $conditions == '[]' || $conditions == '{}' ) { | |
| 204 | 204 | return '[]'; |
| 205 | 205 | } |
| 206 | 206 | |
| 207 | 207 | $conditions = json_decode( html_entity_decode( $conditions ), true ); |
