Bluetooth device keeps erroring

You're likely missing the corresponding packages if you never installed them. Install them with:

sudo xbps-install bluez libspa-bluetooth

Then add yourself to the bluetooth group and enable the service with:

sudo usermod -a -G bluetooth <USER>
sudo ln -s /etc/sv/bluetoothd /var/service

Replace <USER> with your user name.

Note that libspa-bluetooth is for PipeWire (which is the media server that I explained how to set up in the Installation Guide). If you're using a different audio server, see the Void Linux Handbook.