No Response When Clicking Play Button

Open the Lyricify main interface, click the play button, and nothing starts playing, with prompts like Premium Required, No available devices found, please open your Spotify client, or 429 Error, please try again later.

Causes & Solutions

Prompt Premium Required: Cause
Prompt No available devices found, please open your Spotify client: No available devices found, please open your Spotify client, or configure Use Lyricify Built-in Playback (not recommended).
Prompt 429 Error, please try again later: Cause