Bug - Error Message when trying to prepare files for backup

When I click on the button to prepares files for download (within Backup and Restore), I get a 404 error message:

Details:

Status code: 404
Message: Requested backup file not exists.
Description: The requested address ‘/backup_restore/BackupRestore/downloadFile/0’ was not found on this server or you don’t have access to go there.

The error log shows the following:
2021-03-05 12:26:49 Error: [NotFoundException] Requested backup file not exists.
Request URL: /backup_restore/BackupRestore/downloadFile/0
Stack Trace:
#0 [internal function]: BackupRestoreController->downloadFile(‘0’)
#1 /var/www/html/eramba_v2/lib/Cake/Controller/Controller.php(499): ReflectionMethod->invokeArgs(Object(BackupRestoreController), Array)
#2 /var/www/html/eramba_v2/app/Plugin/Crud/Lib/CrudControllerTrait.php(31): Controller->invokeAction(Object(CakeRequest))
#3 /var/www/html/eramba_v2/lib/Cake/Routing/Dispatcher.php(193): AppController->invokeAction(Object(CakeRequest))
#4 /var/www/html/eramba_v2/lib/Cake/Routing/Dispatcher.php(167): Dispatcher->_invoke(Object(BackupRestoreController), Object(CakeRequest))
#5 /var/www/html/eramba_v2/app/webroot/index.php(109): Dispatcher->dispatch(Object(CakeRequest), Object(CakeResponse))
#6 {main}

Any ideas?

Hello Martin, can you send us all logs to support@eramba.org?