Version 5.0.13

applications/cms/sources/Fields/Fields.php

@@ -1290,9 +1290,9 @@ class Fields extends CustomField implements Permissions
 	/**
 	 * Get the "extra" field
 	 *
-	 * @return array
+	 * @return array|null
 	 */
-	public function get_extra(): mixed
+	public function get_extra(): ?array
 	{
 		return isset( $this->_data['extra'] ) ? json_decode( $this->_data['extra'], TRUE ) : [];
 	}