`+org/open-fold` i.e. `zo` not work

### What did you expect to happen?

when type `zo` at org heading, it should expand the heading at current cursor

### What actually happened?

`zo` and `+org/open-fold` don't give me any response

### Describe your attempts to resolve the issue

_No response_

### Steps to reproduce

1. Open Emacs.
2. open a org file with following content

```org
#+title: test

* level1
say hello
** level2
say hello
```

3. put cursor at the line `*level1` and type `zc` to close this fold

4, type `zo` or `M-x +org/open-fold` and don't get any response.

The expected result will be:

### System Information

https://pastebin.com/JtdVTCqU