Application error for timeline info accessed after /alternatives call

[elmisback]

I re-added the "Link to Reports" component we added a little bit before SC but turned off during the demo presentation, and noticed that we're now getting an application error from the Herbie demo for timelines generated using the /alternatives endpoint:
URL: https://herbie.uwplse.org/demo/3a1f7f620bcb3cde52f9d7c04bfbac447b3c3a23.1a83c9f5186db102b678a2d5f869f99992469071/timeline.html

The timeline displays normally for a typical Herbie run: https://herbie.uwplse.org/demo/1cfdd1990d42e8a612051f31af26f699996dd07a.1a83c9f5186db102b678a2d5f869f99992469071/timeline.html

The error:

Exception

The application raised an exception with the message:

hash-ref: no value found for key
  key: 'status

Stack trace:

all-pages at:
  line 15, column 0, in file /home/pavpan/herbie/src/reports/pages.rkt
check-and-send at:
  line 87, column 0, in file /home/pavpan/herbie/src/api/demo.rkt
generate-page at:
  line 81, column 0, in file /home/pavpan/herbie/src/api/demo.rkt
<unknown procedure> at:
  line 375, column 33, in file /usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt
<unknown procedure> at:
  line 375, column 33, in file /usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt
<unknown procedure> at:
  line 63, column 2, in file /usr/share/racket/pkgs/web-server-lib/web-server/dispatchers/dispatch-servlets.rkt
<unknown procedure> at:
  line 141, column 2, in file /usr/share/racket/pkgs/web-server-lib/web-server/private/dispatch-server-with-connect-unit.rkt