Compatibility issue with Roots Soil plugin

Hi Eric

We are using this plugin in our site: https://github.com/roots/soil
(More info here: https://roots.io/plugins/soil/)
When activating your plugin we get the following error everywhere where an image is returned:
Warning: Invalid argument supplied for foreach() in /Volumes/Data/WEB/HTDOCS/site/web/app/plugins/soil/modules/relative-urls.php on line 42

I don’t know now, if this is relates to Soil or Responsify WP.

Any idea?

Thanks,
Aldo

https://www.ads-software.com/plugins/responsify-wp/