No module named 'finrl_meta'

**No module named 'finrl_meta'**

I have successfully installed the FinRL library and when I am running the [Stock_NeurIPS2018.ipynb] (https://github.com/AI4Finance-Foundation/FinRL-Tutorials/blob/master/1-Introduction/Stock_NeurIPS2018_SB3.ipynb) file, it is showing the following error:

1. "
from finrl_meta.preprocessor.yahoodownloader import YahooDownloader
ModuleNotFoundError: No module named 'finrl_meta'
"

2. The same error is also pooping when running the following command:
"
from finrl.meta.preprocessor.preprocessors import FeatureEngineer, data_split

ModuleNotFoundError: No module named 'finrl.meta'
"

3. Also, one more error:
" from finrl import config_tickers

ImportError: cannot import name 'config_tickers' from 'finrl'
"

Need help with what I am doing wrong here.