@MainActor class MortgageCalculatorViewModel: ObservableObject {
    
    // MARK: - Published Properties (Your Data Model)
    @Published public var homeValue: Double = 500_000 // Publishing changes from background threads is not allowed; make sure to publish values from the main thread (via operators like receive(on:)) on model updates.

    @Published public var downPaymentPercentage: Double = 3.5 / 100
    @Published public var isDownPaymentDollarAmount = false
    @Published public var downPaymentDollarAmount: Double = 17500
    @Published public var interestRate: Double? = 6.207
    @Published public var loanTerm: Double = 30.0
    @Published public var startDate = Date().startOfNextMonth
    @Published public var propertyTax: Double = 5000
    @Published public var pmiRate: Double = 1.5 / 100
    @Published public var homeInsurance: Double = 968 / 12
    @Published public var homeInsurance2: Double = 968 / 12
    @Published public var monthlyHOA: Double = 0
    @Published public var otherMonthlyPayment: Double = 0
    @Published public var otherInsurance: Double = 0
    @Published public var estimatedMonthlyPayment: Double = 0
    @Published public var showPopup = false

struct MortgageCalculatorView: View {
    @ObservedObject var viewModel: MortgageCalculatorViewModel

How do I resolve this issue?