Feed rejected Error Code: InvalidMarketplace. Error Type: Sender
The error you receive: Feed rejected Error Code: InvalidMarketplace. Error Type: Sender
Description: In most cases, this error is connected to the status of your seller account on the Amazon marketplace. Please navigate to a seller central on your amazon marketplace and check your seller status (Settings > Account Info).
It should be "Active".
Example on the picture:
In certain cases, you can get both active and valid statuses but still can't export products.
In this case, we suggest adding products via the Amazon interface:
1) Catalog > Add Products
2) Select "I'm adding a product not sold on Amazon"
3) Choose one of the Amazon category using the category tree
In a regular situation, you should get a new page where you can enter your product details.
If there are any issues with your account configuration, you can see the following page:
Please try to "Reactivate Account" and if it does not help, contact Amazon seller support.