I presume you are using Sony Tama. The SFOS releases 4.2 and 4.3 for Tama have the updates to fix that vibrator error. Any chance you might be using an older image?
Specifically for 4.3 release though, you have to disable dnsmasq service for waydroid to run. Refer to https://github.com/sailfishos-open/waydroid
For the vibrator problem, this helped me: (shouldn’t be needed if you are using a recent Tama release):
Edit “/usr/libexec/droid-hybris/system/etc/init/disabled_services.rc” and remove the line “service vendor.vibrator-1-0 /vendor/bin/hw/android.hardware.vibrator@1.0-service_HYBRIS_DISABLED” and restart the device