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The problem (at least in my case) was a conflict between the newest version of Pandas (2.0.0) and yfinance. Downgrading Pandas to 1.5.3 did the trick (if you're using Colab,...

if you copy the dummy_vec_env.py, remove the seed=self._seeds[env_idx] inside the reset(self) function, and then implement this modified version inside the trading environment, it works. Of course it is not a...

To me, the problem was the new Pandas version (2.0.0), which creates conflict with yfinance. Downgrading pandas to 1.5.3 resolved the issue for me. Hope this helps!

Exactly. I am working from colab, and there you just need to run !pip install pandas==1.5.3 before importing libraries. Otherwise, you could create a virtual environment, in which you could...

> No, just downgrading Pandas should do the trick. Let me know if it works!