Pathologic was missing because of a .git folder inside.

[yaffs-website] / web / modules / contrib / redirect / composer.json

{
  "name": "drupal/redirect",
  "description": "Allows users to redirect from old URLs to new URLs.",
  "type": "drupal-module",
  "license": "GPL-2.0+",
  "minimum-stability": "dev",
  "require": {
    "drupal/core": "~8"
  }
}