Oembed not playing on website

[jolly-beans]

- Premium

- USA

- Macbook Air

I'm running into an issue with the oembed on my website not playing full tracks on the playlist. I'm logged into Spotify but the playlist in stuck in preview mode. Previously, when I was testing this on my localhost via Flask, it did full playback but now it's not. What could be the reason why? Here is a Codepen of my code: https://codepen.io/ismarjiw/pen/bGjYyaR

Thank you