I had this problem last week trying to access via FileZilla and via the 000webhost.com links. Filezilla errorw were timeouts. webhost errors were something like invalid data. At the end of last week, I tried Filezilla and was able to successfully upload some files. Today, I had the same errors. I cannot access file manager. The status page right now does not show any error with file manager, so that data is suspect.
As I was writing this reply, I got connect to file manager via 000webhost link. While renaming a member, the link got broken and I was back at the login page. Aaaargh !