421 Sorry, cleartext sessions are not accepted on this server

I'm trying to access an FTP from my web browser, but I get the following error: 421 Sorry, cleartext sessions are not accepted on this server.
After the searching, I found "421 Sorry, cleartext sessions are not accepted on this server" means that the server is using "FTP over Explicit TLS/SSL".

Filezilla might be a good choice for connecting "FTP over Explicit TLS/SSL"

Here are the steps to connect FTP over the TLS

• Download Filezilla using the URL https://filezilla-project.org/
• Install FileZila into your local machine
• Click on File Menu >> Site manager
• Click on the New Site Button
• Enter the Hostname, port, Username and Password
• Select the encryption option "Required explicit FTP Over TLS"

• Click on Ok Button