I'm trying to view the revision history of a proposal on Area 51 by clicking the "edited by X Y days ago", but whenever I click on it, it brings me to this error page:
I've tested it on all proposals I'm following/committed to, and all of them bring me to the error page.
For reference, I'm using Chrome on Windows 10.
Edit: upon further testing, this only happens on proposals in the definition or commitment phase. It works as expected for sites in the beta or launched phase.