This *does* normally work, but the server isn't offering up a download list at the moment.
It occasionally fills up it's diskspace and needs someone to check what it's done and tidy up, as and when they have time.
There are lots of duplicates that should be removed to save some space, in Pi4 LE11 there are at least 15-20 img's with exact same number, just different date like:
LibreELEC-RPi4.arm-11.0-nightly-20220627-f7f28a7.img.gz
LibreELEC-RPi4.arm-11.0-nightly-20220629-f7f28a7.img.gz