An error happened when loading the dashboard, due to favourites.
Favourites will not load up for some users (in this case, Tyler).

This seems to be new since upgrading from b15 to b16. As of b15 it was working correctly.

Looking through https://github.com/jenkinsci/blueocean-plugin/commits/master
The only commit to touch on personalisation is https://github.com/jenkinsci/blueocean-plugin/commit/471cded94015f64512834a4746eca053c4db94a2 - so this may be a place to look (may also be a data problem).

The stack trace:
https://gist.github.com/rtyler/6ed57a6617538ac3305c0d36e269a2ad#file-favorites-json

The data returned in favourites:
https://gist.github.com/rtyler/6ed57a6617538ac3305c0d36e269a2ad#file-favorites-json

The contents of https://ci.jenkins.io/blue/rest/users/rtyler/favorites/ can be found here

Steps to Reproduce

1. Create a Pipeline (not a multibranch Pipeline). It doesn't have to contain anything, just create the item.
2. Favorite the item
3. Reload the Blue Ocean dashboard

See this more complete traceback from Firefox