Why am i getting fetch invoice error?

This is the template to be followed for creating an archive of the known issues, updating existing ones, as well as documenting new bugs.

Lead Author: <Name of the person who has given the solution>

Specify a description of the problem

Briefly describe the problem. You may also include attachments, screenshots

Possible reasons for the above error include:

Mention the possible reasons with a brief description, that could cause the error stated above, in a numbered list.

Actions steps to be taken according to the reasons for the error:

Write a step by step guide on how to resolve the bug/error/problem stated above, for each of the reasons mentioned. You may also include attachments, screenshots or links.

Example

Possible reasons for the above error include:

1. Invoice not received from Amazon itself.

2. Shipment is CANCELLED(customer cancellation through OC) or REJECTED(-OFR submitted by Unicommerce)

Actions steps according to the reason for error:

1. Invoice not received from Amazon itself.

   1. Check whether invoice exists in database(eshopbox-wms-prod) or not. If found then verify if it opens.

   2. If invoice not found raise this concern to Amazon team itself over the email with the shipment/order id

2. Shipment is CANCELLED(customer cancellation through OC) or REJECTED(-OFR submitted by Unicommerce)

   1. Mark the shipment as cancelled in Unicommerce. Inform seller through email or cancel through API call.