Purchasing Contract in SAP Fiori

Hi Experts,

We enabled the purchasing contract approval aplpication.But here we are not able to view the reject button in browser.Find the below screen short  for your reference.

Image may be NSFW.
Clik here to view.

In PO the both the buttons are available.

For this is there any note to be implemented.

Thanks in advance.

Regards,

Myil