local image url error with XD
hi, local image url with below setting in json, but no effect:

```
"icon":"/Users/username/Downloads/icon test/icons/xxxx.jpg"
```

or

```
"icon":"./icons/xxxx.jpg"
```

or

```
"icon":"icons/xxxx.jpg"
```

json file is placed in /Users/username/Downloads/icon test/test.json