Mark shipment failed failed

[Kenai987]

I'm using /feeds/2021-06-30/feeds to mark platform shipments.
The feedType used is POST_FLAT_FILE_FULFILLMENT_DATA.
The file format is TSV.
The file fields are order-id,order-item-id,quantity,ship-date,carrier-code,carrier-name,tracking-number,ship-method,transparency_code,ship_from_ address_name,ship_from_ address_name,ship_from_ address_name,ship_from_ address_name,ship_from_ address_name, and so on. address_name,ship_from_address_line1,ship_from_address_line2,ship_from_address_line3,ship_from_address_city,ship_from_address_ county,ship_from_address_state_or_region,ship_from_address_postalcode,ship_from_address_countrycode.

Now it meets 50001 Error The XML you submitted is ill-formed at the Amazon Envelope XML level at (or near) line 8 column 18.
How can I fix it, thanks.