Pathologic was missing because of a .git folder inside.

[yaffs-website] / web / modules / contrib / embed / embed.services.yml

services:
  access_check.embed_button_editor:
    class: Drupal\embed\Access\EmbedButtonEditorAccessCheck
    tags:
      - { name: access_check, applies_to: _embed_button_editor_access }
  plugin.manager.embed.type:
    class: Drupal\embed\EmbedType\EmbedTypeManager
    arguments: ['@container.namespaces', '@cache.discovery', '@module_handler']