Bad Gateway to server

There is an error when I try to compile

aliBuild build O2 --defaults o2

Server Error: Bad Gateway for url: https://alicache.cern.ch/TARS/slc7_x86-64/store/

Is it possible to fix that? Thank you!

Same here. I am calling the cavalry as this is something with the infrastructure.

Ok, it is back. Thanks to @dberzano