>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3576678. --> Reported by: [murz](https://www.drupal.org/user/157092) Related to !97 >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>After installing the demo on the Simplytest.me, I see a deprecation error:</p> <pre>Deprecated function: Using null as an array offset is deprecated, use an empty string instead in Drupal\language\ConfigurableLanguageManager-&gt;getCurrentLanguage() (line 218 of core/modules/language/src/ConfigurableLanguageManager.php).</pre><p>We need to fix it.</p>