Can't Use Spotify Web Player

[user-removed]

Plan

Free

Country

United Kingdom

Device

Google Pixelbook

Operating System

Chrome OS 76

My Question or Issue

While using Mobile Data, opening Spotify Web Player on the web browser gives me an error message: "No internet connection detected. Spotify will automatically try to reconnect when it detects an internet connection." However, using Spotify Web Player while using WiFi works fine.