It's not obvious what you are trying to do / which creator do you try to download. I don't see any issues with file(s) download.
Try the direct download links (I suppose you are using Windows):
Open, download & run:
Open, download, install & run:
Then use the selected app to download & write the image to your microSD card or an USB flash key.
You can also download the LibreELEC image file for RPi 4 manually: