Error from 2 days ago

Hello, I Have problem with my forum
yesterday only 502 Bad Gateway but now:

General Error

SQL ERROR [ mysqli ]

Connection refused [2002]

An sql error occurred while fetching this page. Please contact an administrator if this problem persists.

Current version: PHP 5.6

I need a URL to make further checks

Since you’ve not read this thread I guess I’ll just close this thread right up now.

You’ve not provided your URL, the email on your forum account doesn’t match any account on our hosting here.

If you are having 502 issues chime into this topic in the future with your URL 000webhostapp clearly written - 502 Bad Gateway Issue