Can't create cooking requests in swh-web

When on any repository page, eg. https://archive.softwareheritage.org/browse/origin/https://github.com/SoftwareHeritage/swh-core/directory/ , clicking Actions>Downloads>as tarball (or as git) sends a GET to https://archive.softwareheritage.org/api/1/vault/directory/30103e19ba4b9f1c16640d63cab69a3dcd0e8e9f/ , which returns a 500 error and the body is: {"exception":"RemoteException","reason":"404 not found"}

Sentry report: https://sentry.softwareheritage.org/share/issue/e5a8822e0f1f40ca984a3783800369e4/ (shows a GET http://vangogh.euwest.azure.internal.softwareheritage.org:5005/progress/directory/30103e19ba4b9f1c16640d63cab69a3dcd0e8e9f 404ing)

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Migrated from T2388 (view on Phabricator)