13.11.2025 | Pascal Crott

Fix broken media previews

media-install.sh

drush php-eval "\Drupal::moduleHandler()->loadInclude('media', 'install');media_install();";

Issue:

The error log is full of the warning "Warning: copy(public://media-icons/generic/generic.png)" and the media library shows no previews. This can happen when environments are set up based on a database dump and without properly transferring the files. The media icons are usually created during the installation of the media module, which will never happen in this scenario.

Solution:

Trigger the install hook of the Core Media module. It will take care of creating those files. Use the provided snippet.

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Show installed module information via composer

terminal.sh

# Syntax.
composer show vendor/package

# Example.
composer show drupal/eca

terminal_result.sh

name     : drupal/eca
descrip. : Event, Conditions, Actions - powerful, versatile, and user-friendly rules engine for Drupal
keywords : 
versions : * 2.1.0
type     : drupal-module
license  : GNU General Public License v2.0 or later (GPL-2.0-or-later) (OSI approved) https://spdx.org/licenses/GPL-2.0-or-later.html#licenseText
homepage : https://www.drupal.org/project/eca
source   : [git] https://git.drupalcode.org/project/eca.git 2.1.0
dist     : [zip] https://ftp.drupal.org/files/projects/eca-2.1.0.zip 2.1.0
path     : /var/www/html/web/modules/contrib/eca
names    : drupal/eca

support
source : https://drupal.org/project/eca
issues : https://drupal.org/project/issues/eca

requires
dragonmantank/cron-expression ^3.1
drupal/core ^10.3||^11
ext-dom *
ext-json *
mtownsend/xml-to-array ^2.0
php >=8.1

requires (dev)
drupal/eca_ui *
drupal/entity_reference_revisions ^1.12
drupal/inline_entity_form ^3.0
drupal/paragraphs ^1.18
drupal/token ^1.15
drupal/webform dev-3465838-drupal-11-compatibility

composer