It broke with the following, sentry should have more detail [1]
May 07 15:57:03 worker0 python3[230930]: [2021-05-07 15:57:03,547: ERROR/ForkPoolWorker-4] Task swh.lister.sourceforge.tasks.FullSourceForgeLister[ec00c8cd-ff5b-47df-adfd-a8c1884b9831] raised unexpected: HTTPError('404 Client Error: Not Found for url: https://sourceforge.net/rest/p/fci-cu-library2/b396')