Problem workflow start expression refers to table with missing metadata

[Emman87]

Hi all,

I am trying to generate a PDF from a GoogleDocs Template. 
I have 'Products' cells that contain a list of products, each product is on a different line.
Each line in the Products should generate on a separate label. \n is used as the delimiter.

Repeat error, any help would be appreciated. Is this even the correct approach?

Error Message -  WORKFLOW START EXPRESSION REFERS TO TABLE WITH MISSING METADATA

Error encountered in step with name [Generate Kit Label Process]: Error: Task 'Generate Kit Label Process' Body template. Start expression 'SPLIT([Products], "\n")' should generate a List of Ref values. Please verify that it generates a List and that the contents of the List are Ref values. Ref values should come from the 'Key' column of the referenced table. Error: The document body is empty

Label template:
<<Start: SPLIT([Products], "\n")>>
Label: <<[This]>>
<<End>>

Products Sample:
516 Gold Plated Impression Pendant – Small
516 Gold Plated Impression Pendant – Small
516 Gold Plated Impression Pendant – Small
516 Gold Plated Impression Pendant – Large
516 Gold Plated Impression Pendant – Large
516 Gold Plated Impression Pendant – Large
516 Gold Plated Impression Pendant – Large
516 Sterling Silver Impression Pendant – Medium