--- ui/web/json_api.py.dist	2019-06-12 23:17:45.000000000 +0200
+++ ui/web/json_api.py	2020-03-25 14:21:59.949587380 +0100
@@ -759,7 +759,7 @@
                     filename, fdump, torrent['options']
                 )
                 deferreds.append(d)
-        return DeferredList(deferreds, consumeErrors=False)
+        return DeferredList(deferreds, consumeErrors=True, fireOnOneErrback=True)
 
     def _get_host(self, host_id):
         """Information about a host from supplied host id.