My web erro 502 bad

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502 Bad Gateway Nginx

https://edurom.ml is my website I have this problem for more than 1 hour. 502 Bad Gateway. I have tried to clear cache, purge dns, and more. But nothing works. I have 5.6 php version. Mysql (The highest version one). I tried also to delete files and then reupload. Even deleted the .htaccess frim htdocs to be sure if that wasnt causing problems to the host. I don’t use cloudflare. Solutions?