Same here. There are errors connecting to FTP via FileZilla and File Manager.
Sometimes, Filezilla says "421 4096 users (the maximum) are already logged in, sorry".
File Manager tells me that my password is incorrect, but when I try to change it, I also get trouble and an error message telling me "An internal error occurred. Our developers have already been notified.".
I hope you (000webhost staff) are working hard to fix this mess as soon as possible.