Gydl doesn't work

When I try to use this application and press Download, it disappear, later it appear and the result is follow text : “Your video has not been downloaded. Please press on Done to return on the main application.”

How can I fix it?

I’ve pushed an update in https://github.com/flathub/com.github.JannikHv.Gydl/pull/9 which fixes the issue in my testing. It should be available to update in the next couple of hours.