Had the same issue after installing the 10.13.2 update... I should have listen to my intuition not to install it after failing twice! It has been real headache to install the said update which has messed up big time and apparently many users...
Now I've seen some of the answers here below and you could also install macOS High Sierra 10.13.3 beta update, it worked out for me and stabilized the entire OS High Sierra system, but you need to subscribe to the Apple Beta program first! here is how:
Subscribe to Apple Beta:
Apple Beta Software Program
AppleConnect Sign In
enroll your Mac
Download Feedback Assistant:
Feedback Assistant
Do another backup with Time Machine:
How to use Time Machine to back up or restore your Mac - Apple Support
Once done then go to App Store and update the above mentioned update!
Let me know if it was helpful and more importantly, in a later stage if you have resolved this issue, as it seems that there are a high volume of issue with the 10.13.2 update, and it would be important to inform other users of a way to resolve it!
Good luck!