dear Team, 

i have a problem about in app notification web, Sorry im a newbie hehe

#1 how to create GetUserThumbnail(?) becasue this step doesnt give any explanation

#2. When I put the element as stated in the picture, the error stated 'Unknown expression'. Did I miss something?

thanks a lot 

Hi Muhammed,

First, there's no "team", there's a "community" of people just like you who like to answer questions. You're not talking to OutSystems employees or anything (although some of them dwell the forum nonetheless).

Secondly, the documentation you reference above assumes some basic working knowledge of the OutSystems platform. It is specifically not suited for beginners. I would suggest you first take some OutSystems training before you try to integrate the more challenging components.