diff --git a/airscore/core/result.py b/airscore/core/result.py
index 61270d2b..4d6b42a1 100644
--- a/airscore/core/result.py
+++ b/airscore/core/result.py
@@ -460,19 +460,20 @@ class CompResult(object):
     def to_html(json_file: str) -> (str, dict or list):
         """ create a HTML file from json result file"""
         import re
-
         from frontendUtils import get_pretty_data
 
         res = get_pretty_data(open_json_file(json_file), export=True)
         comp_name = f"{res['info']['comp_name']}"
         rankings = res['rankings']
+        formula = res['formula']
+
         if len(res['rankings']) > 1:
             zipfile = f"{re.sub(r'[ ,.-]', '_', comp_name)}_after_{res['tasks'][-1]['task_code']}.zip"
         else:
             zipfile = False
 
         '''Tasks table'''
-        tasks = []
+        tbody = []
         thead = [' ', ' ', 'Dist.', 'Validity']
         right_align = [2, 3]
         for t in res['tasks']:
@@ -482,8 +483,8 @@ def to_html(json_file: str) -> (str, dict or list):
                 t['opt_dist'],
                 t['ftv_validity'] if res['formula']['overall_validity'] == 'ftv' else t['day_quality'],
             ]
-            tasks.append(row)
-        tasks = dict(title='Tasks', css_class='simple', right_align=right_align, thead=thead, tbody=tasks)
+            tbody.append(row)
+        tasks = dict(title='Tasks', css_class='simple', right_align=right_align, thead=thead, tbody=tbody)
 
         '''Main results table'''
         thead = ['#', 'Id', 'Name', 'Nat', 'Glider', 'Sponsor', 'Total']
diff --git a/airscore/settings.py b/airscore/settings.py
index 71f93b86..21b3b4b5 100644
--- a/airscore/settings.py
+++ b/airscore/settings.py
@@ -27,7 +27,7 @@
 REDIS_URL = env.str("REDIS_URL") or 'redis://'
 REDIS_PORT = env.int("REDIS_PORT", default=6379)
 REDIS_SSL = env.bool("REDIS_SSL", default=False)
-REDIS_SSL_CERT_REQS = env.str("REDIS_SSL_CERT_REQS") or None
+REDIS_SSL_CERT_REQS = env.str("REDIS_SSL_CERT_REQS", "")
 WEB_SERVER_CONTAINER = env.str("WEB_SERVER_CONTAINER")
 FLASK_CONTAINER = env.str("FLASK_CONTAINER")
 FLASK_PORT = env.str("FLASK_PORT")