interface filter based on process start date time - error: Interface Definition: Expression evaluation error at function 'index' parameter 3 [line 55]: Invalid index: Cannot index property 'MilestoneSchedule' of type Text into type List of

I have a process backed record with grid list and added start time related user filter in the record and it works fine. But when i build the interface with the date filter - Anytime, Last 24 Hours, Last 7 days, Last 30 days, last 365 days, it gives me the below error for all values except for Any Time option.

Interface Definition: Expression evaluation error at function 'index' parameter 3 [line 55]: Invalid index: Cannot index property 'MilestoneSchedule' of type Text into type List of Variant.

Interface Code is below:

=============================================

load(
local!daysFilterLabels: { "Any Time", "Last 24 Hours", "Last 7 Days", "Last 30 Days","Last 365 Days" },
local!daysFilterValues: {-1,0,1,2,3},
local!selectedDaysFilter: -1,
local!showprocesstime: -1,
local!pagingInfo: a!pagingInfo(
startIndex: 1,
batchSize: 20,
sort: a!sortInfo(
field: "pp.startTime",
descending: true
)
),
with(
local!datasubset: queryrecord(
cons!MP_MY_ACTIVE_MILESTONE_SCHEDULES_RECORD,
a!query(
selection: a!querySelection(columns: {
a!queryColumn(field: "MilestoneSchedule.ReqNumber"),
a!queryColumn(field: "MilestoneSchedule.RFPNumber"),
a!queryColumn(field: "MilestoneSchedule.AwardType"),
a!queryColumn(field: "MilestoneSchedule.ProgramOffice"),
a!queryColumn(field: "MilestoneSchedule.ContractingOfficer"),
a!queryColumn(field: "MilestoneSchedule.ProjMSStartDate"),
a!queryColumn(field: "MilestoneSchedule.ProjMSEndDate"),
a!queryColumn(field: "MilestoneSchedule.ActMSStartDate"),
a!queryColumn(field: "MilestoneSchedule.Title"),
a!queryColumn(field: "pp.startTime"),
}),
filter: /*if(local!selectedDaysFilter=-1,null,null),*/
if(local!selectedDaysFilter=-1,null,
if(local!selectedDaysFilter=0,a!queryFilter(field: "pp.startTime", operator: ">=", value: fn!todatetime(fn!today()-1)),
if(local!selectedDaysFilter=1,a!queryFilter(field: "pp.startTime", operator: ">=", value: fn!todatetime(fn!today()-7)),
if(local!selectedDaysFilter=2,a!queryFilter(field: "pp.startTime", operator: ">=", value: fn!todatetime(fn!today()-30)),
if(local!selectedDaysFilter=3,a!queryFilter(field: "pp.startTime", operator: ">=", value: fn!todatetime(fn!today()-365)),null))))
),
pagingInfo: local!pagingInfo
)
),
a!sectionLayout(
contents:{
a!dropdownField(
label:"Started",
choiceLabels: local!daysFilterLabels,
choiceValues: local!daysFilterValues,
value: local!selectedDaysFilter,
saveInto: local!selectedDaysFilter
),
a!gridField(
totalCount: local!datasubset.totalCount,
columns: {
a!gridTextColumn(
label: "PR Number",
field: "MilestoneSchedule.ReqNumber",
data: index(local!datasubset.data.MilestoneSchedule, "ReqNumber", null),
links: a!forEach(
items: local!datasubset,
expression: rule!MP_GenerateProcessDashboardLInk(fv!identifier)
)
),
a!gridTextColumn(
label: "Process Start Time",
field: "pp.startTime",
data: index(local!datasubset.data.pp, "startTime", null),
showWhen: local!showprocesstime <> -1
),
a!gridTextColumn(
label: "Solicitation/Other",
field: "MilestoneSchedule.RFPNumber",
data: index(local!datasubset.data.MilestoneSchedule, "RFPNumber", null)
),
a!gridTextColumn(
label: "Type",
field: "MilestoneSchedule.AwardType",
data: index(local!datasubset.data.MilestoneSchedule, "AwardType", null)
),
a!gridTextColumn(
label: "Division/Office",
field: "MilestoneSchedule.ProgramOffice",
data: index(local!datasubset.data.MilestoneSchedule, "ProgramOffice", null)
),
a!gridTextColumn(
label: "Contracting Officer",
field: "MilestoneSchedule.ContractingOfficer",
data: index(local!datasubset.data.MilestoneSchedule, "ContractingOfficer", null)
),
a!gridTextColumn(
label: "Projected Start Date",
field: "MilestoneSchedule.ProjMSStartDate",
data: index(local!datasubset.data.MilestoneSchedule, "ProjMSStartDate", null)
),
a!gridTextColumn(
label: "Projected End Date",
field: "MilestoneSchedule.ProjMSEndDate",
data: index(local!datasubset.data.MilestoneSchedule, "ProjMSEndDate", null)
),
a!gridTextColumn(
label: "Actual Start Date",
field: "MilestoneSchedule.ActMSStartDate",
data: index(local!datasubset.data.MilestoneSchedule, "ActMSStartDate", null)
),
a!gridTextColumn(
label: "Title",
field: "MilestoneSchedule.Title",
data: index(local!datasubset.data.MilestoneSchedule, "Title", null)
)
},
value: local!pagingInfo,
saveInto: local!pagingInfo
)
}
)
)
)

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Any help is appreciated. Thanks!

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