I’ve run a test export on my end and it completed successfully. The issue appears to have been temporary, please try again and let us know if the problem persists.
I have tried this export a few times over the past week and it seems to fail every time when I attempt it. I just tried a new one and it failed this morning.
In your case, it looks like you’ve reached the 30-minute limit.
I logged into your app and tried to export. The export failed, but for a different reason.
I’ve created an internal task to investigate issues and help you with this.