Doesn't download json on Android TV 8

[J6B]

Hi,

I'm using a xiaomi MiBox 3 under android tv 8 (last official rom).
I'm able to setup and chosse json file to download from my Google Drive but download doesn't seems to work.

When I choose to download the file from cloud to local, a notification that indicate the file is downloaded pops up 4 times.
After when I look for the db content using the settings menu, nothing changed.

thanks for your help