Feed Submit _POST_ORDER_FULFILLMENT_DATA_

[developer-gurpreet]

It was working fine before but for last few days it starts throw this error :
"InvalidParameterValue
Invalid query string provided - Keys may not contain <"

[developer-gurpreet]

I found the solution
The issue is Content Type, Using this package, it send "Content-Type" as "text/xml"
But Amazon update API end point and now we have to send 'Content-Type: application/xml"'

So please update in AmazonFeed.php file
this function
protected function genHeader()
{
$return[0] = "Content-MD5:" . $this->feedMD5;
return $return;
}

TO
protected function genHeader()
{
$return[0] = "Content-MD5:" . $this->feedMD5;
$return[1] = "Content-Type: application/xml";
return $return;
}

[dbarrington]

@branall1

Thank you, saved me a late night.
This resolved an issue that came up for me today.
Reference: https://sellercentral.amazon.com/forums/t/unable-to-submit-feeds-badrequest-on-submitfeed-all-of-the-sudden-keys-may-not-contain-lt/454820/25