fixed typo

workbench-script.py

@@ -309,8 +309,12 @@ def save_snapshot_in_disk(snapshot, path, snap_uuid):
 #   url = 'http://127.0.0.1:8000/api/snapshot/'
 def send_snapshot_to_devicehub(snapshot, token, url):
     url_components = urllib.parse.urlparse(url)
+
+    if isinstance(snapshot, str):
+        snapshot = json.loads(snapshot)
+
     ev_path = "evidence/{}".format(snapshot["uuid"])
-    components = (url_components.schema, url_components.netloc, ev_path, '', '', '')
+    components = (url_components.scheme, url_components.netloc, ev_path, '', '', '')
     ev_url = urllib.parse.urlunparse(components)
     # apt install qrencode
     qr = "echo {} | qrencode -t ANSI".format(ev_url)