Laravel 5.4 Artisan Migrate fails with Call to undefined method dispatch()

I have a Laravel 5.4 app that works fine locally. In trying to put it on my production server, I cannot run migrations. Here is part of the error:

PHP Fatal error:  Uncaught Symfony\Component\Debug\Exception\FatalThrowableError: Call to undefined method Illuminate\Events\Dispatcher::dispatch() in /path/to/app/vendor/laravel/framework/src/Illuminate/Console/Application.php:56

Any help is greatly appreciated.

Edit I just tried to run php artisan --help and, I get the same error.

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