trying to build a lazyVGrid and getting error in looping the grid.

below is the error getting in my code

and here is my model file

and below is the model,

struct HomeEmailsDataModel: Decodable,Identifiable {
var id = UUID()
let firstname, lastname: String?
let threadID: Int?
let status: String?
let readReceiptStatus: Int?
let passwordHash, passwordHint: String?
let passwordProtected, isChecked: Int?
let type: String?
let starred: Int?
let labels: String?
let subject, body: String?
let sentAt, senderUserID: Int?

enum CodingKeys: String, CodingKey {
    case id, firstname, lastname
    case threadID = "threadId"
    case status, readReceiptStatus, passwordHash, passwordHint, passwordProtected, isChecked, type, starred, labels, subject, body, sentAt
    case senderUserID = "senderUserId"
}

}