Enabling the Geosniper block toggles this error message:

The website encountered an unexpected error. Please try again later.

All content of the website becoms inaccessible, including the admin area. However, disabling the module via Drush still works, and toggles the website "on" again. This works like a switch for me, and can be reproduced, thus setting to "critical" since it severely affects Drupal core's operation.

Greetings, -asb