System.MissingMethodException: Method not found: 'UiPath.UiNode UiPath.IUiNode.Click(Int32, Int32, UiPath.UiClickType, UiPath.UiMouseButton, UiPath.UiInputMethod, UiPath.UiCursorMotionType, Int32)

@nancy.gandhi please find a similar issue & solution in this thread:
Click activity not working under any circumstances - #8 by gheorghestan