web: Fix typo in error handler for non-retrievable pages
web: Fix typo in error handler for non-retrievable pages

miloh/spreads,miloh/spreads,adongy/spreads,adongy/spreads,nafraf/spreads,gareth8118/spreads,DIYBookScanner/spreads,nafraf/spreads,miloh/spreads,adongy/spreads,nafraf/spreads,DIYBookScanner/spreads,gareth8118/spreads,DIYBookScanner/spreads,gareth8118/spreads