Both together?
If the second one that has only possible error messages is small enough, you may still add it. If it contains a lot of similar or same errors, then just pick them a single time and it should fit into the post. 
The error you show is relatively common among services with bad restart options. If the service restart option is set to Always it will always restart the service, no matter what happened. This then leads to the service restarts happening to quickly, resulting in the actual error being overshadowed by the unnecessary Start request repeated too quickly. errors.
I would advise you to completely turn off the service, set the restart option within the service to no and then after a reboot, starting the service manually and see what happens.
You can edit the service like this:
nano -Iw /lib/systemd/system/biometric-authentication
- Find the line starting with
Restart=, change it toRestart=no. - CTRL + X
- Y
ENTER- Reboot computer.
systemctl start biometric-authentication
systemctl status biometric-authentication
And add the output in this thread.