I have solution to this
In order to fix the issue, I did the below steps a shown below:
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C:\Program Files (x86)\Parallels\Plesk\admin\bin>ftpmng.exe --remove-all
C:\Program Files (x86)\Parallels\Plesk\admin\bin>cd %plesk_cli%
C:\Program Files (x86)\Parallels\Plesk\bin>repair.exe --reconfigure-ftp-sites
The FTP service was successfully reconfigured.
C:\Program Files (x86)\Parallels\Plesk\bin>