Confirm. Can't get goods from my Arc and observatory today.
Details: I started this event when being in Modern Era, and started Expedition in Modern Era too. And that day Arc and observatory worked as always. Yesterday I entered to Postmodern Era - and Observatory and The Arc stopped working. "An internal error"... and so on.
p.s. Chromium Version 53.0.2785.143 Built on Ubuntu , running on Ubuntu 14.04 (64-bit)