This error can occur when connecting to an FTPS server and files are being uploaded or downloaded or a list of files is being retrieved.


This issue must be fixed on the Windows computer that is running the FTPS server:


- Run the Group Policy Editor (gpedit.msc)


- Go to Local Computer Policy --> Administrative Templates --> Network --> SSL Configuration Settings


- Move TLS_RSA_WITH_RC4_128_SHA to the top of the priority list. How to modify this setting:

- Open a blank notepad document.

- Copy and paste the list of available suites into it.

- Arrange the suites in the correct order; remove any suites you don't want to use.

- Place a comma at the end of every suite name except the last. Make sure there are NO embedded spaces.

- Remove all the line breaks so that the cipher suite names are on a single, long line.

- Copy the cipher-suite line to the clipboard, and then paste it into the edit box. The maximum length is 1023 characters.


- Enable TLS 1.1 and/or TLS 1.2 on servers running Windows 7 or Windows Server 2008 R2. Refer to Microsoft Knowledge Base Article 2588513 to use the automated Microsoft Fix it solution to enable or disable this workaround for TLS 1.1.


- Reboot Windows. This is important.