Grav installation and blank page from browser

Support Installation & Hosting
1

Hello, I’m new on this forum, I’m trying to use Grav for the first time, I’m not an experienced user.
I’m trying to install Grav on a Centos7 running on VirtualBox (in my Win10 host) with Apache 2.4.6 and PHP 7.2.33, according to the Grav documentation “Requirements” and “Installation”.
The webserver is running because I receive from browser the page “Testing 123…” from Apache.
I downloaded the Grav+admin zip file, unpacked and copied in /var/www/html/ folder. Typing on browser http://192.168.1.50/grav-admin I obtain only a blank page.

In the /var/log/httpd/error.log:

[Mon Sep 28 22:59:19.622530 2020] [php7:error] [pid 1411] [client 192.168.1.244:62989] PHP Fatal error: Uncaught RuntimeException: Creating directory failed for /var/www/html/grav-admin/cache/compiled/files/be3357872f300bcf123d6fed23b2be41.yaml.php in /var/www/html/grav-admin/vendor/rockettheme/toolbox/File/src/File.php:338\nStack trace:\n#0 /var/www/html/grav-admin/vendor/rockettheme/toolbox/File/src/PhpFile.php(41): RocketTheme\Toolbox\File\File->save(Array)\n#1 /var/www/html/grav-admin/system/src/Grav/Common/File/CompiledFile.php(64): RocketTheme\Toolbox\File\PhpFile->save(Array)\n#2 /var/www/html/grav-admin/system/src/Grav/Common/Config/Setup.php(216): Grav\Common\File\CompiledYamlFile->content()\n#3 /var/www/html/grav-admin/system/src/Grav/Common/Service/ConfigServiceProvider.php(30): Grav\Common\Config\Setup->init()\n#4 /var/www/html/grav-admin/vendor/pimple/pimple/src/Pimple/Container.php(118): Grav\Common\Service\ConfigServiceProvider->Grav\Common\Service\{closure}(Object(Grav\Common\Grav))\n#5 /var/www/html/grav-admin/system/src/Grav/Common/Grav.php(159): Pimple\Container->offsetGet(‘setup’)\n#6 /var/www/html/ in /var/www/html/grav-admin/system/src/Grav/Common/File/CompiledFile.php on line 79.

I don’t know how to interpret the error, can someone help me?

2

Solved! At first I had not found other threads in the forum to fix the problem, but instead now i found this thread: Blank page after local install (edit: solved).
My case is exactly the same, a permission misleading. I had to add the owner ‘apache’ to all files in the grav directory.

The command (in Centos7):
ps aux | grep -v root | grep apache | cut -d. -f1 | sort | uniq
gave me the result ‘apache’, instead the grav directory owner was ‘root’.
Then, finally solved