What does the error "RMS:Blocked for BL nse_cm broker- ZERODHA block type: ALL" mean?

Zerodha Order Rejections
1

RMS:Blocked for BL nse_cm broker- ZERODHA block type: ALL

Stocks in BL group can only be traded in bulk i.e a minimum of 5 lac shares & from 9:15am to 9:50am.

Click here to see the NSE notification on the same.