The Chancery is aware of this. Fwiw, a mail was sent out (not from the database) to all citizens who hadnt voted on July 27th reminding them of the election (of course I cant rule out this has also gone in spam here and there, but I suspect no more often than usual and I highly doubt it has been blocked alltogether), so that should salvage the situation at least somewhat.
Also, from what I understand, mpf is working on fixing the issues (with some help of comments Bradley made that I forwarded to him).
With regards to turnout, I expected it to decrease, but currently it looks like it might be roughly the same, or even slightly higher.
Of course that is compared to a pretty low bar as turnout last election was devastatingly bad (and email problems then were significantly fewer than the election before that, which in turn had worse turnout than the election before that).