PDFtron data model replacement issue

Product: pdftron

Product Version:9.3.0

Please give a brief summary of your issue:

{
“customerDetails”:[
{
“name”:“venkat”,
“purchasedItems”:{
“insert_rows”:[[“paste”,“10”,“04/08/2022”],[“brush”,“5”,“04/08/2022”]]
}
}, {
“name”:“naveen”,
“purchasedItems”:{
“insert_rows”:[[“paste”,“10”,“03/08/2022”],[“brush”,“5”,“03/08/2022”],[“cool drink”,“50”,“03/08/2022”]]
}
}, {
“name”:“nikhil”,
“purchasedItems”:{
“insert_rows”:[[“paste”,“10”,“02/08/2022”],[“brush”,“5”,“02/08/2022”],[“cool drink”,“50”,“02/08/2022”],[“ice cream”,“45”,“02/08/2022”]]
}
}
]
}

My requirement is I have customer data where single customer can purchase multiple items. I provided that data in the form of json , I need to generate the pdf by replacing the data in word document. Here I am getting exception while converting.
com.pdftron.common.PDFNetException: Exception:
Message: document layout failed: Exception:
Message: Template error: Unmatched tag left-delimiter:
{{customerDetails.
^~
Conditional expression: close_start != StringRef::npos
Version : 9.3.0-88327614b9
Platform : Windows
Architecture : AMD64
Filename : TemplateDocument.cpp
Function : trn::Layout::Template::CreateTemplateNodesForParagraph
Linenumber : 132
Can someone please help me, how i can replace the text in word document.

word to pdf conversion my task.