Issue #1986330 : When Batch ID doesn't exist, Drupal should emit a 404
Issue #1986330 by subhojit777, marcelodornelas, ravi.shankar, immaculatexavier, wheatpenny, nikunjkotecha, shashikant_chauhan, vacho, smagdits, kasperg, aron.beal, andriansyah, rajeevk, Suresh Prabhu Parkala, mangy.fox, cebasqueira, richardcanoe, stefank, quietone, YesCT, AkshayKalose, DrDam, DevElCuy, John Cook, alexpott, xjm, moymilo, dawehner, tstoeckler, webchick, AkashKumar07, bhanu951: When Batch ID doesn't exist, Drupal should emit a 404
Closes #1986330
Updated error message after UX review .