Laravel 5.3 unauthorized() AuthenticationException fatal error - php

Question

I've followed Laravel 5.3 upgrade guide, which says to add an unauthenticated method in App\Exceptions\Handler.
However, I get the following error when it gets called by the Auth system:
FatalThrowableError in Handler.php line 59:
Type error: Argument 2 passed to App\Exceptions\Handler::unauthenticated() must be an instance of App\Exceptions\AuthenticationException, instance of Illuminate\Auth\AuthenticationException given, called in /Users/Username/Development/ProjectName/vendor/laravel/framework/src/Illuminate/Foundation/Exceptions/Handler.php on line 135
I've been searching for the last half hour and couldn't find a solution.
Any help?

Answer 1

Check how your Handler.php file compares to the 5.3 branch version here: https://github.com/laravel/laravel/blob/5.3/app/Exceptions/Handler.php
Note the unauthenticated() method in Handler.php expects an instance of \Illuminate\Auth\AuthenticationException. Make sure use Illuminate\Auth\AuthenticationException; is included at the top of the file.

Answer 2

In my case, i just deleted whoops... or restore the default Handler.php

Answer 3

I had this Error 500 inexplicable issue while upgrading from Laravel 5.2 to 5.3. No laravel error logs in storage/logs, no Apache error logs. no issue with .env, debug was turned on, no broken .htaccess directives, plus php artisan could not run. Tried everything until I looked in the PHP error logs and found:
PHP Fatal error: Uncaught Error: Undefined constant 'Illuminate\Auth\AuthenticationException' in C:\code\laravel-project\vendor\laravel\framework\src\Illuminate\Container\Container.php:79
So I did what #jon suggested and compared my Handler.php file with the fresh laravel one and found this:
In your App/Exceptions/Handler.php make sure that the classes in the $dontreport array are referenced as either strings in quotes:
'\Illuminate\Auth\AuthenticationException',
'\Illuminate\Auth\Access\AuthorizationException',
'\Symfony\Component\HttpKernel\Exception\HttpException',
'\Illuminate\Database\Eloquent\ModelNotFoundException',
'\Illuminate\Session\TokenMismatchException',
'\Illuminate\Validation\ValidationException',
or this way:
\Illuminate\Auth\AuthenticationException::class,
\Illuminate\Auth\Access\AuthorizationException::class,
\Symfony\Component\HttpKernel\Exception\HttpException::class,
\Illuminate\Database\Eloquent\ModelNotFoundException::class,
\Illuminate\Session\TokenMismatchException::class,
\Illuminate\Validation\ValidationException::class,
For some reason I found mine to not have the quotes and fixing that got rid of the Error 500.