some small fixes

rowers/tasks.py

@@ -25,6 +25,8 @@ from rowingdata import rowingdata as rdata
 from datetime import timedelta
 from sqlalchemy import create_engine
 
+from simplejson.errors import JSONDecodeError
+
 #from celery import app
 from rowers.celery import app
 from celery import shared_task
@@ -2846,7 +2848,10 @@ def handle_rp3_async_workout(userid,rp3token,rp3id,startdatetime,max_attempts,de
         if response.status_code != 200: # pragma: no cover
             have_link = True
 
-        workout_download_details = pd.json_normalize(response.json()['data']['download'])
+        try:
+            workout_download_details = pd.json_normalize(response.json()['data']['download'])
+        except JSONDecodeError:
+            return 0
 
         if workout_download_details.iat[0,1] == 'ready':
             download_url = workout_download_details.iat[0,2]
@@ -3035,7 +3040,7 @@ def handle_c2_async_workout(alldata,userid,c2token,c2id,delaysec,defaulttimezone
     try:
         timezone = pytz.timezone(data['timezone'])
     except UnknownTimeZoneError:
-        timezone = 'UTC'
+        timezone = pytz.utc
     startdatetime = startdatetime.astimezone(timezone)
 
     s = 'Time zone {timezone}, stardatetime {startdatetime}, duration {duration}'.format(