I keep getting the same error over and over again.

[snippsat]

This is wrong pair = 'XBT/USD'
If you had look at ohlc_data as mention.

(dl_env) G:\div_code\dl_env
λ python -i kr.py
>>> ohlc_data
{'error': ['EQuery:Unknown asset pair']}

Change to pair = 'XXBTZUSD'

(dl_env) G:\div_code\dl_env
λ python -i kr.py
>>> ohlc_data
{'error': [], 'result': {'XXBTZUSD': [[1619740800, '53579.7', '57987.8', '53071.6',.....