I can't make my store to run after the installation

[erickhelena]

Hello guys, after certain troubles I was able to finish the installation on my hosting.

But some of the options from the back end are not working , some are.

I was getting an error 500 server. I was able to edit the defines file and see the exact error message, and I'm getting this 

***************************************

Kernel->handle()in /home/showaqk6z828/public_html/admin/index.php (line 81)

$request = Request::createFromGlobals();

Request::setTrustedProxies([], Request::HEADER_X_FORWARDED_ALL);

try {

    require_once __DIR__.'/../autoload.php';

    $response = $kernel->handle($request, HttpKernelInterface::MASTER_REQUEST, false);

    $response->send();

    $kernel->terminate($request, $response);

} catch (NotFoundHttpException $exception) {

    define('ADMIN_LEGACY_CONTEXT', true);

    // correct Apache charset (except if it's too late)

*******************************************

I was expeting the problem 500 server would've due to a module, as I saw in another solutions, but I can't find a solution for this error. Could you guys give a hand please. 

And the same for the maintenance mode doesn't work, I get the error 500 server. 

Thank you I appreciate it.