If you see the below error -

Error occurred while manifesting Delhivery B2B Shipment- User is not authorized to access this resource with an explicit deny.

Please follow the below steps -

The Delhivery B2B Password is changed from your end

Step 1: Kindly configure the new password to your eShipz Account

Step 2: eShipz Dashboard > Settings > Carriers > DelhiveryB2B