Raspotify/Librespot连接Spotify Connect后立即断开的问题求助

大家好，我在树莓派3上安装了raspotify，想实现用手机的Spotify Connect把音频输出到树莓派外接的音箱，安装步骤如下：

curl -sSL https://dtcooper.github.io/raspotify/key.asc | sudo tee /usr/share/keyrings/raspotify-archive-keyrings.asc >/dev/null
echo 'deb [signed-by=/usr/share/keyrings/raspotify-archive-keyrings.asc] https://dtcooper.github.io/raspotify raspotify main' | sudo tee /etc/apt/sources.list.d/raspotify.list
sudo apt install raspotify

安装过程看起来一切正常，之后我在/etc/raspotify/conf里设置了LIBRESPOT_NAME="pi_spotify"并重启了树莓派。现在手机Spotify的「设置/连接设备」里能看到这个设备，点击后也显示连接成功，但播放会立刻暂停，音箱完全没声音；再点播放按钮，pi_spotify就直接断开连接了。

另外，树莓派本身的音频功能是正常的——我通过SSH登录后执行aplay /foo/bar.wav，音箱能正常播放音频。

我查了系统日志，先执行了journalctl --system | grep spotify，输出如下：

Jan 17 09:45:07 raspberrypi systemd[1]: Started raspotify.service - Raspotify (Spotify Connect Client).
Jan 17 09:45:07 raspberrypi systemd[1]: raspotify-crash-report-generator.service: Deactivated successfully.
Jan 17 09:45:07 raspberrypi systemd[1]: Finished raspotify-crash-report-generator.service - Raspotify Crash Report Generator.
Jan 17 09:45:07 raspberrypi systemd[1]: raspotify-crash-report-generator.service: Consumed 1.697s CPU time.
Jan 17 09:45:19 raspberrypi librespot[4364]: [2024-01-17T09:45:19Z WARN  librespot_core::apresolve] Ignoring blacklisted access point ap-gue1.spotify.com:4070
Jan 17 09:45:19 raspberrypi librespot[4364]: [2024-01-17T09:45:19Z WARN  librespot_core::apresolve] Ignoring blacklisted access point ap-gew4.spotify.com:443
Jan 17 09:45:20 raspberrypi systemd[1]: raspotify.service: Main process exited, code=exited, status=1/FAILURE
Jan 17 09:45:20 raspberrypi systemd[1]: raspotify.service: Failed with result 'exit-code'.
Jan 17 09:45:20 raspberrypi systemd[1]: raspotify.service: Triggering OnFailure= dependencies.
Jan 17 09:45:20 raspberrypi systemd[1]: Starting raspotify-crash-report-generator.service - Raspotify Crash Report Generator...

看起来服务启动后很快就失败了，后来我又尝试了journalctl -u raspotify.service -b，得到了更详细的日志：

Jan 17 09:45:07 raspberrypi systemd[1]: Started raspotify.service - Raspotify (Spotify Connect Client).
Jan 17 09:45:19 raspberrypi librespot[4364]: [2024-01-17T09:45:19Z WARN  librespot_core::apresolve] Ignoring blacklisted access point ap-gue1.spotify.com:4070
Jan 17 09:45:19 raspberrypi librespot[4364]: [2024-01-17T09:45:19Z WARN  librespot_core::apresolve] Ignoring blacklisted access point ap-gew4.spotify.com:443
Jan 17 09:45:20 raspberrypi librespot[4364]: Failed to get home directory.
Jan 17 09:45:20 raspberrypi librespot[4364]: [2024-01-17T09:45:20Z ERROR librespot_playback::player] Audio Sink Error Connection Refused: <AlsaSink> Device default May be Invalid, Busy, or Already in Use, ALSA>
Jan 17 09:45:20 raspberrypi systemd[1]: raspotify.service: Main process exited, code=exited, status=1/FAILURE
Jan 17 09:45:20 raspberrypi systemd[1]: raspotify.service: Failed with result 'exit-code'.
Jan 17 09:45:20 raspberrypi systemd[1]: raspotify.service: Triggering OnFailure= dependencies.
Jan 17 09:45:32 raspberrypi systemd[1]: Started raspotify.service - Raspotify (Spotify Connect Client).

这里我注意到两个关键错误：Failed to get home directory和ALSA音频输出的连接拒绝错误，但我用speaker-test -t wav -c 2测试ALSA是正常的，音箱能播放测试音。有没有大佬知道这两个错误是否相关？或者该怎么解决连接后立刻断开的问题？

备注：内容来源于stack exchange，提问作者spraff