SymptomsIf FTP storage is used for Scheduled backup with backup files rotation, the scheduled backup task fails, backup files are not rotated, and the temporary backup directory becomes full with backup temporary files.
In the migration.result log you can see error messages like:
<?xml version="1.0" encoding="utf-8"?>
<object name="backup" type="backupowner">
<message code="ApplicationException" severity="error">Cannot export dump file 'backup_info_1106301821.xml' to 'ftp://firstname.lastname@example.org//' [Transport error: unable to delete directory: Curl error: failed writing received data to disk/application]</message>
ResolutionFor fixing this issue, you should replace the \Parallels\Plesk\admin\bin\psarepository.dll file with the attached file.
Note: this file is for Parallels Plesk Panel 9.5.4 version.
Note: this problem was completely fixed in the versions 9.5.5, 10.3.0 and higher.