Thanks for your inquiry. As shared earlier, your document contains glossary with building block with start and end entries that resides in a different sections. Aspose.Words does not support such building blocks in DOC binary format templates at the moment.
For example, the building block with name "1" resides in two sections in your document template. It starts in a header section and it ends in a body section.
We have attached screenshot with an image that explains how to see this in MS Word GUI. In addition, it can be checked with the following VBA code:
bB As buildingBlock
Documents.Add Template:= "fails.dot", NewTemplate:= False,
DocumentType:= wdNewBlankDocument, Visible:= False