Sub Scrambledata()

    Dim ie As Object, objInputs As Object

    Set ie = CreateObject("InternetExplorer.Application")
    ie.Visible = True
    ie.Navigate "http://www.scramble.nl/military-database/usaf"

    Do While ie.readyState <> 4: DoEvents: Loop

    '~~> Get the ID of the textbox where you want to output
    ie.document.getElementById("serial").Value = Sheets("Scramble").Range("A2").Value

    '~~> Here we try to identify the search button and click it
    Set objInputs = ie.document.getElementsByTagName("input")
    For Each ele In objInputs
        If ele.Name Like "sbm" Then
            ele.Click
            Exit For
        End If
    Next
  
 Application.Wait (Now + TimeValue("0:00:02"))
 Sheets("Scramble").Range("B2").Value = ie.document.getElementsByClassName("ScrambleLabel")(11).innerText
    
   
    
    
End Sub
Thank you, Arkadi

Modified code above works for me even with 2 sec delay