server:run Exception There are no commands defined in the “server” namespace

Question

When I run the server using php bin/console server:run I get the following error. There are no commands defined in the \"server\" namespace.

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Answer 1

you must execute this command:

composer req webserver

Answer 2

Verify that the correct APP_ENV is set in the environment. In my case, it was critical.

Answer 3

I had same issue on Symfony 4 after switching in .env to prod. Some commands are not visible on prod.

You either need to swap to dev or: bin/console --env=dev

And so to start server: bin/console --env=dev server:run 0.0.0.0:8005

Answer 4

1. Disabling firewall help
2. running......composer clear cache helped in allowing permission
3. running......composer req webserver helped clear my commands defined in the "server" namespace

Answer 5

Remove env.local file if you've it.

Reson: Because server:run is not executing on production environment

Answer 6

run this command before starting the server.

composer require symfony/web-server-bundle --dev