fixing a bug

rowers/views/analysisviews.py

@@ -416,6 +416,8 @@ def trendflexdata(workouts, options, userid=0):
                 pd.cut(datadf[groupby], bins, labels=False))
         except (ValueError, AttributeError):  # pragma: no cover
             return ('', 'Error: not enough data')
+        except TypeError:
+            return ('','Error: something wrong with the data')
     else:  # pragma: no cover
         try:
             bins = np.arange(datadf['days ago'].min()-binsize,