Im so desperate for help :(

I am getting the above error , what does it mean and how to fix it?
I am trying to add the document in the grid , and save to its record type.

The rule input Doc is defined as (array) could this be where the problem is?

a!sectionLayout(
label: "Documentation Details ",
labelIcon: "file-text",
labelSize: "SMALL",
labelColor: "STANDARD",
contents: {
a!columnsLayout(
columns: {
a!columnLayout(
contents: { a!gridLayout(
totalCount: count(ri!Doc),
headerCells: {
a!gridLayoutHeaderCell(label: "Document" ),
a!gridLayoutHeaderCell(label: "Name" ),
a!gridLayoutHeaderCell(label: "Classification" ),
a!gridLayoutHeaderCell(label: "Uploaded By" ),
a!gridLayoutHeaderCell(label: "Uploaded On" )
},
columnConfigs: {
a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight:3 ),
a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight:3 ),
a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight:3 ),
a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight:3 ),
a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight:2 )
},
rows: a!forEach(
items: ri!Doc, /*localdata*/
expression: a!gridRowLayout(
id: fv!index,
contents: {
a!fileUploadField(
target: cons!SKJ_DOCUMENTS_FOLDER,
maxSelections: 1,
value: /*local!doc,*/
fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{6c686146-7506-45c1-b2e6-1db2e0eb6900}appianDocId'],
saveInto:
{/*local!doc*/
fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{6c686146-7506-45c1-b2e6-1db2e0eb6900}appianDocId'],
a!save(fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{66325d17-158b-4776-98b3-761a5a458e5c}addedBy'],loggedInUser()),
a!save(fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{601d2c71-2a27-48c0-939b-61ff68722c5a}requestId'],1),
a!save(fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{1fc16e35-b769-46b0-8d9e-9dc633cbb090}addedOn'],today()),
a!save(fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{f65ae4e8-afd3-4a5a-80c7-3c67d225a274}docName'],extract(fn!getcontentobjectdetailsbyid(fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{6c686146-7506-45c1-b2e6-1db2e0eb6900}appianDocId']), "Name:", "."))
/* a!save(fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{6d510991-df65-4ae0-a9b9-179a36931fb0}docId'],document(documentId: local!doc, property: "id"))*/
},
buttonDisplay:"ICON",buttonStyle: "STANDARD"),
a!textField(
value:/* if(a!isNullOrEmpty(fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{6c686146-7506-45c1-b2e6-1db2e0eb6900}appianDocId']),extract(fn!getcontentobjectdetailsbyid(fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{6c686146-7506-45c1-b2e6-1db2e0eb6900}appianDocId']), "Name:", "."),""),*/
saveInto: 'recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{f65ae4e8-afd3-4a5a-80c7-3c67d225a274}docName'
),
/* For the Department Column*/
a!dropdownField(
label: "department " & fv!index,
placeholder: "-- Select -- ",
choiceLabels: { "First", "Sec"},
choiceValues: { 1, 2 },
value: fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{a3f411dd-394e-4039-a2d0-600d333f94b0}classification'],
saveInto:fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{a3f411dd-394e-4039-a2d0-600d333f94b0}classification'],
required:false
),
a!textField(
value:local!addedBy ,/*fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{f65ae4e8-afd3-4a5a-80c7-3c67d225a274}docName'],*/
saveInto:fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{66325d17-158b-4776-98b3-761a5a458e5c}addedBy'],
required:true
),
a!textField(
value: today(),
saveInto: fv!item['recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document.fields.{1fc16e35-b769-46b0-8d9e-9dc633cbb090}addedOn'],
required:true
)
}
)
),
showWhen: not(isnull(index(local!selectedEmployees,1,"null").accountId)),
addRowlink: a!dynamicLink(
label: "Add Document",
value: append(ri!Doc,'recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document'()) ,
/*startDate: today() + 1},*/
saveInto: {
a!save(
ri!Doc,
append(ri!doc, 'recordType!{52d6bfd4-9a4e-457c-ab2e-ede6cffdb054}SKJ Document')
)
}
/* saveInto: {
a!save(local!document, append(local!document, save!value))
}*/
),
rowHeader: 1
)
}
)
}
)
},
showWhen: not(isnull(index(local!selectedEmployees,1,"null").accountId))
)
Please look at my code and help me

