عدم بازکردن ایندکس سایت و php my admin

دوستان مشکل چیه صفحه اول ایم ارور رومیده
***** Error

The ***** server received an invalid response from an upstream server.
The ***** server could not handle the request GET /index.php.
Reason: DNS lookup failure for: socket=%2fusr%2flocal%2fphp56%2fsockets%2fadmin.so ck
Additionally, a 502 Bad Gateway error was encountered while trying to use an ErrorDocument to handle the request.


وقتیم میخوای php my admin روبازکنی این ارور

***** Error

The ***** server received an invalid response from an upstream server.
The ***** server could not handle the request GET /phpMyAdmin/index.php.
Reason: DNS lookup failure for: socket=%2fusr%2flocal%2fphp56%2fsockets%2fadmin.so ck
Additionally, a 502 Bad Gateway error was encountered while trying to use an ErrorDocument to handle the request.

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