小编yuc*_*cer的帖子

鉴于我在我的 ubuntu 系统上安装了 Spotify 当我使用以下方法升级时：

sudo apt-get update

然后我收到这个错误：

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repository.spotify.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 13B00F1FD2C19886

W: Failed to fetch http://repository.spotify.com/dists/stable/InRelease  

W: Some index files failed to download. They have been ignored, or old ones used instead.

我得到这个错误goldendict的英文维基百科和英文维基词典：

Query error: XML parse error: unexpected end of file at 1,1