To solve the problem, you can choose one of the following options:

• Try changing the type of connection activating or disabling the FTP Passive mode. 
• The export is blocked by Firewall, Anti-Spyware or  Anti-Virus programs. Disable temporarily protection programs installed on your PC or set them in order to allow WebSite X5 to have free access to the Internet. 
• Server temporarily unavailable. The Server may be undergoing maintenance or simple reboot. Try again later or contact your Provider. 
• Remote disk is full. The space on the Server disk is full so you can't complete the publication of the site. Verify the possibility to save space deleting all the already published files then export again.
• The login and password are not correct, please check them. To be sure copy and paste them to avoid any typing errors.