Same problem here, only connection is sporadic... sometimes it connects and sometimes not.
When cant connect, get following FileZilla message...
Status: Resolving address of files.000webhost.com
Status: Connecting to 18.104.22.168:21...
Status: Connection established, waiting for welcome message...
Response: 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
Response: 220-You are user number 644 of 4096 allowed.
Response: 220-Local time is now 22:05. Server port: 21.
Response: 220-IPv6 connections are also welcome on this server.
Response: 220 You will be disconnected after 15 minutes of inactivity.
Command: USER domainorg
Response: 331 User domainorg OK. Password required
Command: PASS *********
FileZilla - Site Manager (settings) per 000webhost.com tutorial...
Port: 'blank' (also tried '21' but no difference in results)
Protocol: FTP - File Transfer Protocol
Encryption: Only use plain FTP (insecure)
Logon Type: Normal
User: domain.org (for this post using 'domain' instead of actual domain name)
Background color: None
Server Type: Default (Autodetect)
Adjust server timezone offset: 0 Hours, 0 Minutes
Transfer mode: Default
Like noted, password etc settings seem to work sometimes and not others.