504 Gateway Timeout on the following pages: https://forums.robertsspaceindustries.com/discussion/comment/144196/#Comment_144196 https://forums.robertsspaceindustries.com/discussion/comment/148033/#Comment_148033 https://forums.robertsspaceindustries.com/discussion/comment/5053979/#Comment_5053979 These are pages which have been linked and used as references for a while e.g. from: https://robertsspaceindustries.com/spectrum/community/SC/forum/50259/thread/black-holes-confirmed/1429820 So this is definitely a back end bug, not bad links.