>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #2726925. --> Reported by: [pbuyle](https://www.drupal.org/user/215342) >>> <p>When using a <code>composer.json</code> file containing the following:</p> <pre>{<br>&nbsp; "repositories" :[<br>&nbsp;&nbsp;&nbsp; ...<br>&nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "type": "composer",<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "url": "https://packages.drupal.org/7"<br>&nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp; ...<br>&nbsp; ],<br>&nbsp; require: {<br>&nbsp;&nbsp;&nbsp; "drupal/views_app_folders": "1.0-dev"<br>&nbsp; }<br>}</pre><p>composer produce the following error:</p> <pre>&nbsp; [RuntimeException]&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>&nbsp; Could not load package drupal/views_app_folders in https://packages.drupal.org/7: [UnexpectedValueException] Could not parse ver&nbsp; <br>&nbsp; sion constraint : Invalid version string ""</pre><p>This happen when reading the file visible at <a href="https://packages.drupal.org/7/drupal/views_app_folders%241862e60cc530ab1806ec4fb236160b9fb219532ade49aec53e2f94635258378b.json">https://packages.drupal.org/7/drupal/views_app_folders%241862e60cc530ab1806ec4fb236160b9fb219532ade49aec53e2f94635258378b.json</a> (copy attached to this issue).</p> <p>The file does indeed contains an invalid version for the needed libraries module.</p>