Class log does not exist in Container.php but I have no unquoted spaces in .env or errors in config

I've been stuck trying to figure out why I get this every time I try to run php artisan key:generate (or any other php artisan command).

PHP Fatal error:  Uncaught ReflectionException: Class log does not exist in C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php:734
Stack trace:
#0 C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php(734): ReflectionClass->__construct('log')
#1 C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php(629): Illuminate\Container\Container->build('log', Array)
#2 C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Foundation\Application.php(697): Illuminate\Container\Container->make('log', Array)
#3 C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php(849): Illuminate\Foundation\Application->make('log')
#4 C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php(804): Illuminate\Container\Container->resolveClass(Object(ReflectionParameter))
#5 C:\Users\Sam\P in C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php on line 734

Fatal error: Uncaught ReflectionException: Class log does not exist in C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php:734
Stack trace:
#0 C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php(734): ReflectionClass->__construct('log')
#1 C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php(629): Illuminate\Container\Container->build('log', Array)
#2 C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Foundation\Application.php(697): Illuminate\Container\Container->make('log', Array)
#3 C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php(849): Illuminate\Foundation\Application->make('log')
#4 C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php(804): Illuminate\Container\Container->resolveClass(Object(ReflectionParameter))
#5 C:\Users\Sam\P in C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\framework\src\Illuminate\Container\Container.php on line 734

Some suggested putting this at the top of vendor\laravel\framework\src\Illuminate\Container\Container.php because it would reveal the underlying error:

namespace {
    use Monolog\Logger as Monolog;
    class log extends Illuminate\Log\Writer {
        function __construct()
        {
            $this->monolog = new Monolog("local");
        }
    }
}

But instead I started getting:

PHP Fatal error:  Uncaught ReflectionException: Class env does not exist in C:\Users\Sam\PhpstormProjects\banqo.net\vendor\laravel\
framework\src\Illuminate\Container\Container.php:744

with a similar stacktrace to the initial error. I've spent hours researching online what could be causing it. Someone suggested running 'phpunit', so I did and I got the error:

Dotenv\Exception\InvalidFileException: Dotenv values containing spaces must be surrounded by quotes.

I thought this was interesting because people had suggested that .env values containing spaces could have caused the initial problem, but I have thoroughly and repeatedly checked my .env file for spaces and there are none where there shouldn't be. I even tried wrapping literally every single .env value in quotes. On top of all this my IDE (Phpstorm) tells me that there are no errors in any of the files in my config folder. Does anyone have any ideas at all what could be causing this issue? I've been dealing with this since last night and I'm ready to punch a hole in my screen.

via Chebli Mohamed