Spotify embed only playin preview on webserver

[gplaze13]

Plan

Free

Country

France

Device

Raspberry Pi

Operating System

Raspbian

My Question or Issue

Hello, I am trying to embed a spotify player into a html webapge on my Rpi.

The issue I have is that the embed is only playing a preview of the playlist's songs. 

When I copy the url in the embed and put it direclty in the browser it works fine but in the embed it is only showing preview. I am alreayd logged in in spotify into the browser.

 Could you help me finding the cause of the issue ? 

PS: the allow:"encrypted-medai" tag is already present in the iframe.