FileZilla can log in but can not read file list from ftp server.

Status: Logged in
Status: Retrieving directory listing…

Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listing

Solution one: changing from passive mode from active mode or inverse.

Try solution two, if the first one doesn’t work.

Solution two: for encryption connection, if you choice is “use explicit FTP over TLS if available” as shown below, You can change it to “only use  plain FTP (insecure)” and reconnect.

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Dr. Lu