Hi @jj0012345 ,
Sorry for the long delay.
For your first question it seems you have the same issues as this one Can't understand what's wrong with my BIDS config file.
For the second question: you can definitively use --bids_validate but it needs bids_validator to be installed to be able to use it: GitHub - bids-standard/bids-validator: Validator for the Brain Imaging Data Structure
Hope it helps
Best,
Arnaud