artisan stopped working?

Question

Composer

artisan stopped working as I assume after updating composer packages.
Now with any command "php artisan" gives the same error:

$ php artisan route:list

Fatal error: Class 'Symfony\Component\Console\Input\ArgvInput' not found in C:\xampp7\htdocs\project\artisan on line 34

At the same time, composer itself works without problems. Tried it --selfupdate and dumpautoload doesn't help.
Does anyone have any ideas what could be the problem?

Answer 1

Well, what is there to think? It is written, the class Symfony\Component\Console\Input\ArgvInput was not found. Go to vendor/symfony/console/Input, see if everything is ok with the ArgvInput.php file. If yes, then most likely, the problem will be solved by running.
If the file is really missing, then install the dependencies again.