[InvalidArgumentException] Could not find package symfony/web-server-bundle in a version matching 5.0.

The error message "InvalidArgumentException: Could not find package symfony/web-server-bundle in a version matching 5.0" indicates that the version of the Symfony package you are trying to install does not have a version compatible with 5.0.

To resolve this issue, you have a few options:

1. Update the version constraint: If you are specifying a version constraint in your composer.json file or in your command, you can try updating it to a version that is available and compatible with Symfony 5.0. You can check the available versions of the package on the Symfony website or on the package's repository.

2. Remove the package: If you no longer need the symfony/web-server-bundle package, you can remove it from your composer.json file and run composer update to remove the package from your project.

3. Check dependencies: Make sure that the package you are trying to install does not have any dependencies that conflict with Symfony 5.0. In some cases, a package may require a specific version of Symfony that is not compatible with the version you are using.

4. Check Symfony version: Ensure that you are using Symfony version 5.0 or higher. If you are using an older version of Symfony, it is possible that the package you are trying to install is not compatible with it.

By following these steps, you should be able to resolve the "InvalidArgumentException: Could not find package symfony/web-server-bundle in a version matching 5.0" error.