Cast button lost with the newest version

Hello,

So I bought a smart TV over a month ago and I was able to cast everything from my phone including Deezer. I tried it today, i'm having a party so I need it, but I can't find the cast button??? I tried all the solutions previously said in the community, restarting my router, TV, app uninstalling and installing again etc and nothing worked. Could you pls finaly fix the cast option cause I see a lot of people struggling with it??? I was successful at casting yt and FB and Netflix etc but not Deezer and bc I restarted tv and router the issue had to be with the Deezer app. I'm using the latest version of the app and I've been a premium member for many years now.