How to fix Mixed Content: https error on laravel apps

I moved my website to HTTPS and now I am receiving an error message in the Statamic control panel (CP).:

Mixed Content: The page at '<URL>' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint '<URL>'. This request has been blocked; the content must be served over HTTPS.

I am using Statamic Laravel app. To fix this issue, you need to go to the AppServiceProvider file and force the scheme to be HTTPS:

                                            use Illuminate\Support\Facades\URL;

class AppServiceProvider extends ServiceProvider
     * Bootstrap any application services.
     * @return void
    public function boot(): void
        if($this->app->environment('production')) {