You are probably trying to do one of two things:
This report outlines the process and necessary resources for downloading a National ID (NID) card from the official Bangladesh Election Commission portal using the QR code system. Direct Access Links Official NID Portal: services.nidw.gov.bd/nid-pub servicenidwgov bd nidpub qr code link download link
The official, legitimate portal uses .gov.bd domain extension. Any site using .com or .org claiming to offer NID downloads should be treated as fraudulent unless verified. You are probably trying to do one of
for official verification. Only the "NID Pub" app can access the government’s internal validation server. servicenidwgov bd nidpub qr code link download link