Facing an error on Trade/Test set while using Covariance matrix as per the tutorial

[arunbharadwaj2009]

ValueError Traceback (most recent call last)
in <cell line: 1>()
96
97 e_trade_gym = StockTradingEnv(df = processed_trade,**env_kwargs)
---> 98 env_trade, obs_trade = e_trade_gym.get_sb_env()
99
100 df_account_value_sac, df_actions_sac = DRLAgent.DRL_prediction(

2 frames
/usr/local/lib/python3.10/dist-packages/stable_baselines3/common/vec_env/dummy_vec_env.py in _save_obs(self, env_idx, obs)
106 for key in self.keys:
107 if key is None:
--> 108 self.buf_obs[key][env_idx] = obs
109 else:
110 self.buf_obs[key][env_idx] = obs[key] # type: ignore[call-overload]

ValueError: setting an array element with a sequence. The requested array would exceed the maximum number of dimension of 1.

Screenshot shows how the cov_list feature looks on my testing/trading set. Please help