FeedFixer

Amazon error 5501: No product was found for the product ID

What does it mean?

You sent only an offer (price, stock) for a GTIN that is not in Amazon's catalogue.

How to fix it

Send the full product data, correct the GTIN, or apply for a GTIN exemption.

Where do you fix it?

More on this subject

Source

Summarised in our own words; Amazon's page is leading.