You have requested a non-existent service "kernel".

[grekpg]

Symfony 4.4.*
"php": "^7.4",
"sonata-project/admin-bundle": "3.55.0",
"sonata-project/doctrine-orm-admin-bundle": "^3.9",
"sonata-project/page-bundle": "^3.11",
"sonata-project/translation-bundle": "^2.4",
"sonata-project/user-bundle": "^4.4",
"symfony/flex": "^1.1",

After install i get error

In ContainerBuilder.php line 1032:

You have requested a non-existent service "kernel".

[shaunthornburgh]

I am getting same error

[ViktorParakhonia]

You did not added config yaml. Especially "upload_dir" property.