MuIn the previous post, we had just started with porting the Flag module over to Drupal 8. We converted the *.info file to the new YAML file format. We also created a branch in the git repository on Drupal.org. At this point, the module is far from functional. While we can enable it, even visit the Admin > Structure > Flags page, creating a flag results in a massive 500 error on the server. Our next task is to find out why that happened, and do what we can to fix it.