Error #0042: the public FTP server is down
You are trying to get data over the public access to MyChat file server, but it is off.
By default, built in FTP server on MyChat Server is enabled and work on TCP ports from 20 000 to 20 100. There is a user for public access with login "mcuser" and password "mychat". MyChat Client can request these data for work, when you, for example, visit the link on public FTP in the chat.
If the server administrator disables FTP, you will get this error.
Enable FTP server in settings for MyChat Admin console.
What is the difference between HTTP and FTP? What is better and for what tasks?