Pathologic was missing because of a .git folder inside.

[yaffs-website] / web / modules / contrib / simple_sitemap / simple_sitemap.info.yml

name: 'Simple XML Sitemap'
type: module
description: 'Creates a standard conform hreflang XML sitemap of your content.'
configure: simple_sitemap.settings
package: SEO
# core: 8.x

# Information added by Drupal.org packaging script on 2017-03-29
version: '8.x-2.9'
core: '8.x'
project: 'simple_sitemap'
datestamp: 1490775486