fix invalid type exception

pathfind.go

@@ -26,6 +26,10 @@ func getValueFrom[D any](obj D, keyWithDots string) (interface{}, error) {
 		v = v.FieldByName(key)
 	}
 
+	if v.Kind() == reflect.Invalid {
+		return nil, newInvalidPathError(keyWithDots)
+	}
+
 	for v.Kind() == reflect.Ptr {
 		v = v.Elem()
 	}