If you encountered this error, you are not alone. I’ve encountering this on my VPS too often that I decided to use FireFTP for a while until I found out that it’s a settings issue.

Here’s what you need to do to solve this.

1. Go to Site Manager of FileZilla
2. Select the FTP connection where you are having problem
3. Click on Transfer Settings tab
4. Check Limit Number of Simultaneous Connections
5. Set Maximum Number of Connections to 1
6. Save and connect to your server

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