Warning: Attempt to read property "filename" on bool in Drupal\smartchoice_entities\Controller\FlipBookController->build() (line 36 of modules/custom/smartchoice_entities/src/Controller/FlipBookController.php).
Notice: file_get_contents(): Read of 12288 bytes failed with errno=21 Is a directory in Drupal\smartchoice_entities\Controller\FlipBookController->build() (line 36 of modules/custom/smartchoice_entities/src/Controller/FlipBookController.php).
