Hello,

We are getting an error when we try to make a shipping label. Debug mode shows the following:

stdClass Object
(
    [HighestSeverity] => ERROR
    [Notifications] => stdClass Object
        (
            [Severity] => ERROR
            [Source] => ship
            [Code] => 6070
            [Message] => Unable to retrieve Letterhead and/or Signature images.
            [LocalizedMessage] => Unable to retrieve Letterhead and/or Signature images.
        )

    [TransactionDetail] => stdClass Object
        (
            [CustomerTransactionId] => *** Express Domestic Shipping Request using PHP ***
        )

    [Version] => stdClass Object
        (
            [ServiceId] => ship
            [Major] => 21
            [Intermediate] => 0
            [Minor] => 0
        )

)

If we try to upload a new letterhead or signature image it gives the error: Your selected image does not have any data.
It doesnt matter wich image we select. We tried a JPG and a PNG and we checked if the image is available on our website.

Any ideas on how to fix this? Running Version 3.3.13 of the Fedex plugin and Version 3.2.6 of Woocommerce