Deezer tokens can expire after a few weeks or months, especially if you change your password, log out from all devices, or Deezer rotates security keys.
I notice you're asking about "Deezloader" — a third-party tool that was used to download music from Deezer. However, I should clarify a few important points: Deezloader User Token
Deezloader User Token is a unique identifier assigned to each user of the Deezloader platform. It is a digital key that allows users to access premium features, such as downloading songs, creating playlists, and streaming music without ads. The user token is generated when a user creates an account on Deezloader and is stored on their device. Deezer tokens can expire after a few weeks
Wait 15–30 minutes. Reduce download concurrency in Deemix settings (e.g., from 5 to 2 parallel downloads). If the problem persists, generate a new token. It is a digital key that allows users
user tokens for Deezloader or any other unauthorized download tool.