Why does the browser display a blank page after the site transfer?

Question

1C-Bitrix

Transferred the site to a new hosting, connected the database, did everything using the Bitrix admin panel. Everything is automated there and I just had to click next and then enter the data of the new database.
At first, the site gave an error 500, but after a call to technical support, now the page is completely empty.
Lets go to the admin! And the site itself does not display anything
Added 'debug' => true to .settings.php,
I also included all possible options for error output on hosting, but the result is zero.
Tell me where you can see Bitrix errors

Answer 1

Lets go to the admin!

Run testing /bitrix/admin/site_checker.php