Nake Build Error
Sadly the Stub looks inactive..

When I make Nake Build in Stub or Godot Nim it returns:

```
Godot Engine v3.3.4.stable.official.faf3f883d - https://godotengine.org
OpenGL ES 3.0 Renderer: NVIDIA GeForce GTX 960/PCIe/SSE2
OpenGL ES Batching: ON

ERROR: save_file: Condition "!file" is true. Returned: ERR_FILE_CANT_WRITE
   At: modules/gdnative/nativescript/api_generator.cpp:47
ERROR: init: Failed to generate C API

   At: modules/gdnative/nativescript/nativescript.cpp:1058
Failed to generate api.json
```

and idk what to do :(?
already tried to reinstall it, with depth and without etc like in (#62).. 

I even tried it with an older Godot version..