After I resolved my speed problems with Composer (see the post here ) I got this error once the Composer ended updating dependencies:
Fatal error: Call to undefined method Illuminate\Foundation\Application::getConfigLoader() in E:\path-to-my-project\vendor\laravel\framework\src\Illuminate\Foundation\start.php on line 106
As I already mentioned in my previous post I don’t know if this was due to me canceling composer updates several times or something else but the same error appeared when I opened my project URL in web browser.
The solution is simple: Delete bootstrap/compiled.php file.
After that run php artisan optimize command, which will generate new compiled.php file. I am not sure if this last step is necessary because everything seems to work even without the compiled.php file but I would advice to run this command just in case and regenerate compiled.php file.