Magento 2 admin panel 404 – SAM (Selman) Tunc

It’s Hard to find why its happen without seeing your installation process. But this may help you:

You can reinstall your project
By mistake you forget your admin URL; You can see/change admin URL from

app/etc/env.php at line no 5.
```
return array (
'backend' =>
array (
'frontName' => 'admin_q76xvk',
),
```
Clean cache/reindexing and delete var/cache , var/page_cache folder.
Make change in .htaccess (Just copy this file pub/.htaccess to magento root folder)

OTHER WAYs