Laravel 7 email exceptions broke after Symfony 5 update

Below is the code I ended up using to get the results I wanted in the exception notification email. The primary piece I was missing earlier is that I wasn't passing a true value into the HtmlErrorRender class to raise the debug flag. The corrected line is shown here:

new HtmlErrorRenderer(true);

Here is the complete code I am using now for the app/Exceptions/Handler.php file

<?php

namespace App\Exceptions;

use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Log;
use Throwable;
use Symfony\Component\ErrorHandler\ErrorRenderer\HtmlErrorRenderer;
use Symfony\Component\ErrorHandler\Exception\FlattenException;

class Handler extends ExceptionHandler
{
    /**
     * A list of the exception types that are not reported.
     *
     * @var array
     */
    protected $dontReport = [
    ];

    /**
     * A list of the inputs that are never flashed for validation exceptions.
     *
     * @var array
     */
    protected $dontFlash = [
        'password',
        'password_confirmation',
    ];

    /**
     * Report or log an exception.
     *
     * @param  \Throwable  $exception
     * @return void
     *
     * @throws \Exception
     */
    public function report(Throwable $exception)
    {
        if ($this->shouldReport($exception)) {
            $this->sendEmail($exception); // sends an email
        }
        parent::report($exception);
    }

    /**
     * Render an exception into an HTTP response.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Throwable  $exception
     * @return \Symfony\Component\HttpFoundation\Response
     *
     * @throws \Throwable
     */
    public function render($request, Throwable $exception)
    {
        if ($exception instanceof \Illuminate\Session\TokenMismatchException) {  //https://gist.github.com/jrmadsen67/bd0f9ad0ef1ed6bb594e
            return redirect()
                ->back()
                ->withInput($request->except('password'))
                ->with('errorMessage', 'This form has expired due to inactivity. Please try again.');
        }

        return parent::render($request, $exception);
    }

    /**
     * Sends an email to the developer about the exception.
     *
     * @return void
     */
    public function sendEmail(Throwable $exception)
    {
        try {
            $e = FlattenException::create($exception);
            $handler = new HtmlErrorRenderer(true); // boolean, true raises debug flag...
            $css = $handler->getStylesheet();
            $content = $handler->getBody($e);

            \Mail::send('emails.exception', compact('css','content'), function ($message) {
                $message
                    ->to('youremailhere@gmail.com')
                    ->subject('Exception: ' . \Request::fullUrl())
                ;
            });
        } catch (Throwable $ex) {
            Log::error($ex);
        }
    }
}

The $css and $content are passed into the view at resources/views/emails/exception.blade.php. The code I have in that file is as follows:

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8" />
        <style>{!! $css ?? '' !!}</style>
    </head>
    <body>
        {!! $content ?? '' !!}
    </body>
</html>

After testing the answer , i get some error "Parssing to Exception class", so if you are using Laravel 7, you need to use "createFromThrowable" instade of "create" to get compatible with the Throwable Object.

To get the complete response as html simply use:

$html = ExceptionHandler::convertExceptionToResponse($e);

Here is a the complete Handler.php Code

<?php

namespace App\Exceptions;

use Log;
use Mail;
use Exception;
use Throwable;
use App\Mail\ErrorNotification;
use Illuminate\Database\Eloquent\ModelNotFoundException;
use Symfony\Component\HttpKernel\Exception\HttpException;
use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;


class Handler extends ExceptionHandler
{

    /**
     * A list of the exception types that should not be reported.
     *
     * @var array
     */
    protected $dontReport = [
        HttpException::class,
        ModelNotFoundException::class,
    ];

    /**
     * Report or log an exception.
     *
     * This is a great spot to send exceptions to Sentry, Bugsnag, etc.
     *
     * @param  \Exception  $e
     * @return void
     */
    public function report(Throwable $e)
    {
        if ($this->shouldReport($e)) {
            $this->sendEmail($e);
        }

        return parent::report($e);
    }

    /**
     * Render an exception into an HTTP response.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Exception  $e
     * @return \Illuminate\Http\Response
     */
    public function render($request, Throwable $e)
    {
        if ($e instanceof ModelNotFoundException) {
            $e = new NotFoundHttpException($e->getMessage(), $e);
        }

        return parent::render($request, $e);
    }


    public function sendEmail(Throwable $e)
    {
        try {

            $html = ExceptionHandler::convertExceptionToResponse($e);

            Mail::to('youremailhere@gmail.com')->send(new ErrorNotification($html));

        } catch (Exception $ex) {
            Log::error($ex);
        }
    }

}