Problems with the ta library source code

n + = S[k] in ta-ball Traceback (most recent call last): File E:/FMZ/binance-futures-connector-python-main/MyFmz.py, line 707, in boll = TA.BOLL ((r, 22, 2)) is the File E:/FMZ/binance-futures-connector-python-main/MyFmz.py, line 193, in BOLL n + = S[k] TypeError: unsupported operand type ((s) for +=: float and list

How to handle this under the guidance of Dream General