Error 521, ftp no working

i am using cloudflare,
my site

  1. and i see Error 521 Ray ID: 4a05f6302b1db6ec • 2019-01-28 19:45:50 UTC

Web server is down

  1. when i enter in my cpanel and file manager - i see: 404 Not Found nginx
  2. i using filezila and i see:
    |Status:|Waiting to retry…|
    |Status:|Resolving address of|
    |Status:|Connecting to…|
    |Status:|Connection established, waiting for welcome message…|
    |Response:|220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------|
    |Response:|220-You are user number 694 of 3900 allowed.|
    |Response:|220-Local time is now 23:00. Server port: 21.|
    |Response:|220-This is a private system - No anonymous login|
    |Response:|220 You will be disconnected after 60 seconds of inactivity.|
    |Command:|USER epiz_22752385|
    |Response:|331 User epiz_22752385 OK. Password required|
    |Command:|PASS **********|
    |Error:|Connection timed out|
    |Error:|Could not connect to server|

This problem only appeared on 01/27/2019

the new wave has started again so please everyone who has a similar problem please do not open new topics
thank you for understanding

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