Just upgraded - no music - 'musicmetadata'

I just upgraded to Volumio 2.457 and have lost my music - NAS is mounted and can been seen from shell. In reviewing the logs I found this:

2018-10-02T05:13:00.775Z - error: Stack trace: Error: Cannot find module ‘musicmetadata’
at Function.Module._resolveFilename (module.js:547:15)
at Function.Module._load (module.js:474:25)
at Module.require (module.js:596:17)
at require (internal/module.js:11:18)
at Object. (/volumio/app/plugins/music_service/mpd/index.js:13:10)
at Module._compile (module.js:652:30)
at Object.Module._extensions…js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)

Any thoughts on how to resolve?

Thanks

You did some manual modification, either doing volumio pull or installing some node_modules.
This makes update inconsistent.
Settings -> System -> Delete user data is the way to go for you

This seems to have worked - though I’m having to set up from scratch. I don’t believe I modified any file - though I may have touched one at some point.

Thanks+