MacStandaloneBuild: Save File Panel Stuck on Saving

[Handy Tedja Sukmana]

Hi, I have tried to save and load file using this plugin. The load function works fine.
The save function seems to be working on Editor, but when I tried it in mac stand alone build, the save panel showed up. But, when I press either "Save" or "Cancel" button, it just stuck there. It won't save the file, nor the save dialogue won't be closed.
And when I tried to move the focus to other app window, and then back to it, the save window just keep asking for the save path. And the only way to close my app is by using force quit.

Any solution for this?