This error is caused by your FTP client attempting to bind to a port that is already in use. This is a common issue with some FTP clients, and can be resolved by enabling "passive mode" in your FTP client.
We have an article on how to do this for FileZilla and WinSCP: How do I enable passive mode in FileZilla?
500 OOPS: vsf_sysutil_bind
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500 OOPS: vsf_sysutil_bind
Last edited by 0nopeO on Tue Feb 03, 2026 8:59 am, edited 1 time in total.
Reason: updated for clarity.
Reason: updated for clarity.