Preview: Exception thrown: OCP\Files\GenericFileException

[lxto]

After upgrading Nextcoudpi to ncp 1.54.0 and Debian-Bookworm, php v. 8.3 i get this issue. Preview generation stops working. Deleting and reinstalling Preview-Generator did not change anything. What can i do?

Nextcloud Log says:

[index] Fehler: Exception thrown: OCP\Files\GenericFileException GET /index.php/apps/photos/api/v1/preview/607191?etag=dc7cb9be6503ddf04a03509df8126e94&x=512&y=512 von 192.168.1.80 von lxto um 07.05.2024, 08:07:12

After executing preview from "ncp-config" > "Tools" manually CLI says:

`preview:pre-generate [OCP\Exceptions\AppConfigUnknownKeyException]
unknown config key

Exception trace: at /var/www/nextcloud/lib/private/AppConfig.php:203 OC\AppConfig->isLazy() at /var/www/nextcloud/lib/private/AppConfig.php:829 OC\AppConfig->setTypedValue() at /var/www/nextcloud/lib/private/AppConfig.php:1358 OC\AppConfig->setValue() at /var/www/nextcloud/lib/private/AllConfig.php:208 OC\AllConfig->setAppValue() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:216 OCA\PreviewGenerator\Command\PreGenerate->setPID() at /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php:105 OCA\PreviewGenerator\Command\PreGenerate->execute() at /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php:298 Symfony\Component\Console\Command\Command->run() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:1040 Symfony\Component\Console\Application->doRunCommand() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:301 Symfony\Component\Console\Application->doRun() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:171 Symfony\Component\Console\Application->run() at /var/www/nextcloud/lib/private/Console/Application.php:213 OC\Console\Application->run() at /var/www/nextcloud/console.php:113 require_once() at /var/www/nextcloud/occ:11