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• 17:04, 21 April 2026 Mngr talk contribs created page Drupal:Config/Performance issue (Created page with "== Drupal 11 Media Upload: PDF Thumbnail Troubleshooting (AlmaLinux 10.3 & Hyper-V) == === Issue Summary === * '''Symptoms:''' PDF uploads show a "black space" (broken icon) during the "Add Selected" AJAX phase. Standard images work fine. PDF thumbnails render correctly only ''after'' the entity is saved and viewed on the next page. * '''Error Log:''' {{code|fopen(): Failed to open stream: No such file or directory}} targeting a {{code|.webp}} or {{code|.png}} derivativ...")