update

app.py

@@ -108,7 +108,7 @@ def get_leaderboard_df():
     ]
 
     df = pd.DataFrame.from_records(results, columns=COLS)
-    df = df.sort_values(by=[ MSVAMP_COL], ascending=False, na_position='last')
+    df = df.sort_values(by=[ MSVAMP_COL], ascending=False)
     df = df[COLS]
 
     return df
@@ -131,7 +131,7 @@ def get_leaderboard_13Bdf():
     # for i in results:
     #     i.append(i[0])
     df = pd.DataFrame.from_records(results, columns=COLS)
-    df = df.sort_values(by=[ MSVAMP_COL], ascending=False, na_position='last')
+    df = df.sort_values(by=[ MSVAMP_COL], ascending=False)
     df = df[COLS]
 
     return df