[Solved] ASP.Net Web API Error: The requested resource does not support http method GET

I get this error

{"Message":"The requested resource does not support http method 'GET'."}

Imports System.Data.SqlClient
Imports System.Net
Imports System.Web.Http

Namespace Controllers
    Public Class UpdateBalancesController
        Inherits ApiController
        <Route("api/UpdateBalances/UpdateCustomer")>
        <HttpPost>
        Public Function UpdateCustomer() As IHttpActionResult
            Dim constr As String = ConfigurationManager.ConnectionStrings("SLISAPI2023ConnectionString").ConnectionString
            Using Con As New SqlConnection(constr)
                Con.Open()
                Using cmd As New SqlCommand
                    cmd.Connection = Con
                    cmd.CommandType = CommandType.StoredProcedure
                    cmd.CommandText = "initializeTbalPersonal"
                    cmd.ExecuteReader()
                    Con.Close()
                End Using
            End Using
            Return Ok()
        End Function
    End Class
End Namespace

I do not have ajax code but this is how i am going to call it in vb

Dim jsonbk As String = (New WebClient()).DownloadString("http://localhost/LIGTCOLLEGEKATIKAMULIBRARYAPI/SLISWEBAPI/api/UpdateBalances/UpdateCustomer")
'Dim dt3 As DataTable = JsonConvert.DeserializeObject(Of DataTable)(jsonbk)