How do I open the realm file when I enable Sandbox?

I think there is an orchid called File Access under App Sandboxing on the Capabilities tab in the project settings. What happens if User Selected File is Read/Write?

I have given up using the realm file selected from the Open Panel in update mode.
Instead, we decided to first select a directory in the Open Panel to give permission to read and write, and then change the realm file under that directory to the UI to select it.
Also, I decided to delete the realm related file (lock, note, management) when the application ends.