When I attempt to access the "Nomination" phase of an election which has concluded, I get the "Oops! Something Bad Happened" page. This happens both on sites which I am a member of and on those of which I am not. I get the page both when navigating by direct link (e.g. https://rpg.stackexchange.com/election/6?tab=nomination) or when clicking on the tab from the main election page:
From a (Discord) conversation with a CM, it seems that she could see the tab, but only when logged in. The other two tabs, "Primary" and "Election", work fine for me. I discovered the bug when attempting to read nomination comments for an old election I had stumbled across. Notably, since comments are only displayed within "Nomination", this means I am completely unable to access any election comments for old elections which weren't cancelled; such comments are often useful to understand a site's context at a certain point in time.
Per comments, this is also happening for several entire elections, e.g. Freelancing's two elections with candidates and Community Building's single one.