In the GSM Section IDs, we see 2.7 Material Specification Section IDs.
Then a problem appears,
Tab Nutrition and Section Nutrient Composition's ID is not available.
We wonder Nutrient Composition's ID.
Looks like a gap in the documentation. The SectionID should be called "GSM.NutrientAnalysis.NutrientComposition"
Give that a try and let us know if that worked.