YAML Document Template - Save PDF to field in record

I saw this YAML on another discussion board but it throws a jinja error in the Body of the HTTP request that says "This field contains invalid jinja references"

# Doc Gen Testing
#

# Account slugs:
#  - quickbase[CHANGE ME]: Realm Default Account <None>
#  - microsoft-outlook[CHANGE ME]:
#    <None>
---
- META:
    name: Doc Gen Testing
- ACTION quickbase[CHANGE ME] quickbase_api make -> a:
    inputs:
      method: GET
      url: https://api.quickbase.com/v1/docTemplates/1/generate?tableId=DBID_CHANGE_ME&format=pdf&pageSize=Letter&filename=Invoice&margin=1
        1 1 1&unit=in&orientation=portrait&recordId=1
    name: Generate Doc
- ACTION quickbase[CHANGE ME] quickbase_api make -> b:
    inputs:
      body: "{\n    \"to\": \"CHANGE_ME_TABLE_ID\",\n    \"data\": [\n      {\n        \"6\"\
        : {\n            \"value\": {\n                \"fileName\": \"{{a.json.fileName}}\"\
        ,\n                \"data\": \"{{a.json.data}}\"\n              }\n      \
        \  }\n      }\n    ],\n    \"fieldsToReturn\": []\n  }\n      }\n    }\n \
        \ ]\n}\n    \"fieldsToReturn\": []\n  }"
      method: POST
      url: https://api.quickbase.com/v1/records
    name: Save File to a Table
    note: 'Write the record '
- LOOKUP quickbase[CHANGE_ME] record look_up -> c:
    inputs-meta:
      table: '"Demo App: Invoice Files" <CHANGE_ME>'
      export_fields: '"File" <6>'
    inputs:
      id: '{{b.json.metadata.createdRecordIds[0]}}'
- ACTION microsoft-outlook[CHANGE_ME] email send_email_attachment -> d:
    inputs-meta:
      attachments:
        name: '{{c.file.file_name}}'
        url: '{{c.file.file_transfer_handle}}'
    inputs:
      body: Testing writing doc to QB table, looking up that record to get the file
        transfer handle, then emailing it using the outlook channel
      subject: Doc Gen Testing
      to_addresses: CHANGE_ME

Any help is appreciated.  In essence I am trying to save a document template for a record to an attachment field in that record.  Thank you!