Amazon error 99003: A required value is missing for the variation theme
What does it mean?
The variation theme says what distinguishes the children, for example size and colour. A child lacks one of those values.
How to fix it
Give every child a value for each attribute of the variation theme.
Where do you fix it?
- In your product data (your source)
- 8058Required attributes are missing for the SKU
- 99001A value is required for this field
- 4000002A value for the attribute is required
- 99010A required value is missing from a group of fields
- 99006A value is required because dependent fields are filled
- 99013A primary field is empty while dependent fields have values
- 99019A valid value is required in one of two fields
- 18448Required attributes are incomplete
Source
Summarised in our own words; Amazon's page is leading.