How would I go about this error?

[stylingpat]

Output:
Exception in thread Thread-4:
Traceback (most recent call last):
  File "C:\Users\zenfi\AppData\Local\Programs\Python\Python39\lib\threading.py", line 954, in _bootstrap_inner
    self.run()
  File "C:\Users\zenfi\AppData\Local\Programs\Python\Python39\lib\threading.py", line 892, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\zenfi\OneDrive\Desktop\Everything Else\Python\3 Candles\3.4.py", line 283, in liveTimer
    modelLive(app)
  File "C:\Users\zenfi\OneDrive\Desktop\Everything Else\Python\3 Candles\3.4.py", line 236, in modelLive
    df = dataDataframe(app,tickers,ticker)
  File "C:\Users\zenfi\OneDrive\Desktop\Everything Else\Python\3 Candles\3.4.py", line 106, in dataDataframe
    df = pd.DataFrame(TradeApp_obj.data[symbols.index(symbol)])
KeyError: 0

Where should I start to look? I've been trying to google it, but the examples are over my head

[jefsummers]

Start at the bottom most line. You are creating a dataframe from TradeApp_obj.data and it is causing a key error. Look at that data and hopefully will be obvious.