Elgg org 502 bad gateway message and some problems related to this

I needed to download latest Elgg rc one or two days ago but elgg org was consistently not available for quite some time. Screenshot given below, but afterwards I could not find any thing related to what happened and why in Elgg org. The github downloadable zip is composer dependent which I am not conversant with. If, for situations like this, a regular zip version is always available via github it could have been great. Is there any problem in making a zip version of the core rc (like plugins have downloadable zips) ? Is there any way to convert the composer version to zip version ?