Improve error message upon failing to resolve a claim

CHANGELOG.md

@@ -20,6 +20,7 @@ at anytime.
   * Renamed `lbrynet.lbrynet_daemon` to `lbrynet.daemon`
   * Initialize lbrynet settings when configuring an api client if they are not set yet
   * Updated lbryum imports
+  * Improve error message when resolving a claim fails using the "get" command
   *
 
 ### Fixed

lbrynet/daemon/Daemon.py

@@ -1501,7 +1501,7 @@ class Daemon(AuthJSONRPCServer):
 
         if not resolved or 'value' not in resolved:
             if 'claim' not in resolved:
-                raise Exception("Nothing to download")
+                raise Exception("Failed to resolve stream at lbry://{}".format(uri.replace("lbry://", "")))
             else:
                 resolved = resolved['claim']