425 Unable to listen, too many pending PASV/EPSV requests

This error message indicates that the FTP server is unable to establish a connection because it has already received too many requests for passive (PASV) or extended passive (EPSV) data transfers. This usually occurs when multiple clients are trying to connect to the server at the same time. To resolve this issue, you can try increasing the maximum number of concurrent connections allowed by your FTP server or limit the number of clients that can connect simultaneously. You may also need to increase the timeout value for passive data transfers in order for them to complete successfully.