Using popover options: Cannot set property 'component' of null


I’m using ionic popover.
This worked well till I tried to use PopoverOptions param. When I use this param it throw exception which I can see at console: “Cannot set property ‘component’ of null”.

See my code:

TypeScript - host page:

 message(item: ItemSliding) {
   var options :PopoverOptions = {cssClass:"popupSize"};
    let popover = this.popoverCtrl.create(MessagePage, null, options);

TypeScript - popup page:

  import { Utility } from '../../../shared/utility'
  import { Component } from '@angular/core';

       templateUrl: "message.html"

  export class MessagePage {

      constructor(public utility: Utility) { }

scss of popup page:

height: 90%;