Interface with Read Only Grid only displaying Headers and not the data

Hi,

I am using Appian Version 25.4, I have created an Interface with Grid in it. Grid is just expected to read data from Record Type and display it on the Grid. But I only see headers on Interface when I am previewing it. What am I doing wrong here?

I am including code here and the output of the Preview. I am new to Appian and appreciate your help here.

{
  a!localVariables(
    local!pagingInfo: a!pagingInfo(
      startIndex: 1,
      batchSize: 20
    ),
    a!gridField(
      label: "Portfolio",
      labelPosition: "ABOVE",
      data: a!queryRecordType(
        recordType: 'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated',
        fields:{
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{85555feb-8c36-4fce-9eff-2ef66aaab755}loanId',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{c4b7627c-131b-475a-8901-54d34623f07f}servicerLoanId',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{eefd35a7-2d68-4220-be87-84654d07c4c2}sellerLoanId',          
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{1f0535e8-e642-4961-9861-01f94896ddab}priorServicerLoanId',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{4262d1b3-f3d0-4f8e-b405-42497445cbbc}propStreet',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{5395535b-0578-4f00-84fc-2927c28296fb}propUnit',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{7fbd17bb-9270-41b5-9889-cf8e62f1b408}propCity',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{915d3c4d-e5e4-4eb9-9406-bd18c4b16a76}propState',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{d5a7a19f-33e1-413f-a1df-915c45790a62}propZip',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{cf1e3408-273f-4b67-912a-6a68e468c30e}propCounty',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.relationships.{13f8ddba-0158-4034-8ec8-d16cc75df9a3}recordTypeMappingsdealNoMapping.fields.{d6fc1865-671a-4abd-afaf-27d484311afb}dealName',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{3e326dab-c1ce-485c-b2b0-113608fea39a}borrowerFname',
          'recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{377b31ae-a3da-41a6-abc2-d47d27847e7a}borrowerLname'
        },
        pagingInfo: local!pagingInfo
      ),
      columns: {
        a!gridColumn(
          label: "VWH Loan Id",
          value: fv!row['recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{85555feb-8c36-4fce-9eff-2ef66aaab755}loanId']
        ),
        a!gridColumn(
          label: "Servicer Loan ID",
          value: fv!row['recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{c4b7627c-131b-475a-8901-54d34623f07f}servicerLoanId']
        ),
        a!gridColumn(
          label: "Seller Loan ID",
          value: fv!row['recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{eefd35a7-2d68-4220-be87-84654d07c4c2}sellerLoanId']
        ),        
        a!gridColumn(
          label: "Prior Servicer Loan ID",
          value: fv!row['recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{1f0535e8-e642-4961-9861-01f94896ddab}priorServicerLoanId']
        ),
        a!gridColumn(
          label: "Property Address",
          value: fv!row['recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{4262d1b3-f3d0-4f8e-b405-42497445cbbc}propStreet']
        ),
        a!gridColumn(
          label: "Property County",
          value: fv!row['recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{cf1e3408-273f-4b67-912a-6a68e468c30e}propCounty']
        ),      
        a!gridColumn(
          label: "Deal Name",
          value: fv!row['recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.relationships.{13f8ddba-0158-4034-8ec8-d16cc75df9a3}recordTypeMappingsdealNoMapping.fields.{d6fc1865-671a-4abd-afaf-27d484311afb}dealName']
        ),          
        a!gridColumn(
          label: "Borrower Name",
          value: fv!row['recordType!{730d5dd7-5828-443c-89cf-89b097b856cb}TV Record Type loan..static_info_updated.fields.{3e326dab-c1ce-485c-b2b0-113608fea39a}borrowerFname']
        )
      },
      refreshAfter: "RECORD_ACTION"
    )
  )
}