Magento 2.4.0 fails to install

[kamzata]

I'm trying to make a fresh install of Magento 2.4.0. I want to say in advance I didn't have any problem at all in installing Magento 2.3.5 with PHP 7.3.20. Anyway...
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Here's my config:

• Debian 10
• Apache 2.4.38
• PHP 7.4.8
• MariaDB 10.4.13
• Composer 1.10.10

# The installation process

1. I tried either method: by uploading all files directly and by using Composer:

composer create-project --repository-url=https://repo.magento.com/ magento/project-community-edition magento

2. After that, I set the permissions:

chmod 775 -R /var/www/magento && chown -R www-data:www-data /var/www/magento && cd /var/www/magento && find . var generated vendor pub/static pub/media app/etc app/code app/design -type f -exec chmod g+w {} + && find var generated vendor pub/static pub/media app/etc app/code app/design -type d -exec chmod g+ws {} + && chown -R :www-data . && chmod u+x bin/magento

3. Then I run the installation command:

magento setup:install --base-url=https://dev.example.com --db-host=localhost --db-name=magento --db-user=magento --db-password=mypassoword --admin-firstname=admin --admin-lastname=admin --admin-email=myuser@gmail.com --admin-user=admin --admin-password=mypassword --language=en_US --currency=USD --timezone=Europe/Rome --use-rewrites=1

and I received some errors:

[Progress: 653 / 1206]
Module 'Magento_ComposerRootUpdatePlugin':
Installing data... Reading /<magento_root>/composer.json
Loading config file /<magento_root>/composer.json
Failed to initialize global composer: Composer could not find the config file: /<magento_root>/var/composer_home/composer.json
To initialize a project, please create a composer.json file as described in the https://getcomposer.org/ "Getting Started" section

4. Then I tried to reach the frontend and I got this error:

An error has happened during application run. See exception log for details.

And this is the var/log/exception.log

main.CRITICAL: Class Magento\Framework\App\Http\Interceptor does not exist {"exception":"[object] (ReflectionException(code: -1): Class Magento\\Framework\\App\\Http\\Interceptor does not exist at /var/www/magento/vendor/magento/framework/Code/Reader/ClassReader.php:26)"} []

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# What I tried

I tried to recompile, flush the cache, deploy...

Any ideas?

[gaurav_harsh1]

Hello @kamzata 

try this below solution for once if it works for you :

https://magento.stackexchange.com/questions/291297/magento-2-3-invalidagumentexception-composer-coul...

[kamzata]

Thanks, but I see they seem to have the same problem that I have but I cannot see any solutions.

[gaurav_harsh1]

@kamzata 

Create the composer.json file in var/composer_home. The contents of file:

{}

Try if it works.

[kamzata]

Thanks but I already tried and it didn't work. Anyway, as I wrote, the exception error persists even uploading all files directly thus without using the composer method. So, I think both the composer error and the exception thrown are not strictly related. 

[ngaymoi2020]

See Video

Install Magento 2.4

https://www.youtube.com/watch?v=yeHcOMeDoJ0