Hi  @tewald35,

Thank you for reporting your issue to our community.

Here is what you can do to solve the problem:
1) Ensure that your internet connection is stable and working properly. Try accessing other websites or online services to confirm your connection is active.
2) Make sure the FTP server you are trying to connect to is up and running. If possible, check the server status or contact the server administrator.
3) Check the port forwarding settings to ensure that the necessary ports for FTP (typically port 21 for control connections and a range of ports for data connections) are forwarded correctly.  You may refer to the FAQ to open the Service Port: Port forwarding: how to set up virtual server on TP-Link wireless router?
4) Verify that your FTP client is configured correctly with the right server address, port number, username, and password.
5) Ensure that the connection mode (Active or Passive) is set correctly. Some servers may require one mode over the other.