How to add A+ content, system does not recongnise this ASIN as part of your brand

I received an error stating that ‘The ASIN referenced by this SKU is not recognised as part of your brand’.

This message means that the ASIN is not being properly mapped to your brand. This is usually caused by inaccurate listing data on the ASIN. You can update the data by selecting Edit on that ASIN in your Manage Inventory tools in Seller Central. The brand name listed on the ASIN does not match the brand name as approved by Amazon’s Brand Registry. These need to match exactly, i.e. adding spaces or hyphens will lead to a mismatch.

If you have registered your brand but still do not have access to A+, you can contact Brand Registry here.