Error retrieving proxied image (DuckDNS, Nginx) every time

Hello,

since months I see this error and no pics are on Spotify or google cast.

Logger: homeassistant.components.media_player
Source: components/media_player/init.py:1168
Integration: Mediaplayer (documentation, issues)
First occurred: 13:24:09 (2 occurrences)
Last logged: 13:26:40

Error retrieving proxied image from https://i.scdn.co/image/ab67616d0000b273913a6d7587d853e1dd4c1580
Error retrieving proxied image from https://i.scdn.co/image/ab67616d0000b273b9b950561aa1d3606865a2ee

I have my installation on a nuc with mariadb, nginx and duckdns.
All works fine expect this error.

How can I fix this?