Minute data does not work

To reproduce this problem, simply go into one of the examples, set IS_BACKTEST=True, and change the timeframe to bt.TimeFrame.Minutes (instead of Days).

Exception in thread Thread-1:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/trading_calendars/utils/memoize.py", line 47, in __get__
return self._cache[instance]
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/weakref.py", line 394, in __getitem__
return self.data[ref(key)]
KeyError:

I also tried using Polygon data, but I ran into a different issue:

requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: https://api.polygon.io/v2/...

Does anyone know how to solve this? It seems like this is a fundamental issue that should be affecting everyone.

If there is no way to solve it, is there at least a way to run with daily data at market open (instead of close)?