Getting 500 server error with Laravel 5.7

[SevymolSebastian]

PHP: 7.2
Laravel: 5.7

Some requests failed with below error(Http 500- Server error), while other requests along the same request are successful. Passport is used to authenticate api request. api auth middleware is used.

production.ERROR: No application encryption key has been specified. {"exception":"[object] (RuntimeException(code: 0): No application encryption key has been specified. at F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Encryption\EncryptionServiceProvider.php:42)
[stacktrace]
#0 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Support\helpers.php(1041): Illuminate\Encryption\EncryptionServiceProvider->Illuminate\Encryption\{closure}(NULL)
#1 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Encryption\EncryptionServiceProvider.php(46): tap(NULL, Object(Closure))
#2 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Encryption\EncryptionServiceProvider.php(24): Illuminate\Encryption\EncryptionServiceProvider->key(Array)
#3 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Container\Container.php(764): Illuminate\Encryption\EncryptionServiceProvider->Illuminate\Encryption\{closure}(Object(Illuminate\Foundation\Application), Array)
#4 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Container\Container.php(646): Illuminate\Container\Container->build(Object(Closure))
#5 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Container\Container.php(601): Illuminate\Container\Container->resolve('encrypter', Array)
#6 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Foundation\Application.php(734): Illuminate\Container\Container->make('encrypter', Array)
#7 F:\wamp64\www\service\vendor\laravel\passport\src\PassportServiceProvider.php(271): Illuminate\Foundation\Application->make('encrypter')
#8 [internal function]: Laravel\Passport\PassportServiceProvider->Laravel\Passport\{closure}(Object(Illuminate\Http\Request), NULL)
#9 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Auth\RequestGuard.php(58): call_user_func(Object(Closure), Object(Illuminate\Http\Request), NULL)
#10 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Auth\GuardHelpers.php(60): Illuminate\Auth\RequestGuard->user()
#11 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Auth\Middleware\Authenticate.php(61): Illuminate\Auth\RequestGuard->check()
#12 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Auth\Middleware\Authenticate.php(41): Illuminate\Auth\Middleware\Authenticate->authenticate(Array)
#13 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(151): Illuminate\Auth\Middleware\Authenticate->handle(Object(Illuminate\Http\Request), Object(Closure), 'api')
#14 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#15 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Middleware\ThrottleRequests.php(57): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#16 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(151): Illuminate\Routing\Middleware\ThrottleRequests->handle(Object(Illuminate\Http\Request), Object(Closure), 120, '1')
#17 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#18 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(104): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#19 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Router.php(667): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#20 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Router.php(642): Illuminate\Routing\Router->runRouteWithinStack(Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request))
#21 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Router.php(608): Illuminate\Routing\Router->runRoute(Object(Illuminate\Http\Request), Object(Illuminate\Routing\Route))
#22 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Router.php(597): Illuminate\Routing\Router->dispatchToRoute(Object(Illuminate\Http\Request))
#23 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(176): Illuminate\Routing\Router->dispatch(Object(Illuminate\Http\Request))
#24 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(30): Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}(Object(Illuminate\Http\Request))
#25 F:\wamp64\www\service\vendor\spatie\laravel-cors\src\Cors.php(28): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#26 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(151): Spatie\Cors\Cors->handle(Object(Illuminate\Http\Request), Object(Closure))
#27 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#28 F:\wamp64\www\service\vendor\fideloper\proxy\src\TrustProxies.php(57): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#29 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(151): Fideloper\Proxy\TrustProxies->handle(Object(Illuminate\Http\Request), Object(Closure))
#30 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#31 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\TransformsRequest.php(31): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#32 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(151): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure))
#33 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#34 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\TransformsRequest.php(31): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#35 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(151): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure))
#36 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#37 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\ValidatePostSize.php(27): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#38 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(151): Illuminate\Foundation\Http\Middleware\ValidatePostSize->handle(Object(Illuminate\Http\Request), Object(Closure))
#39 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#40 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode.php(62): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#41 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(151): Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode->handle(Object(Illuminate\Http\Request), Object(Closure))
#42 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#43 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(104): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#44 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(151): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#45 F:\wamp64\www\service\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(116): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter(Object(Illuminate\Http\Request))
#46 F:\wamp64\www\service\public\index.php(55): Illuminate\Foundation\Http\Kernel->handle(Object(Illuminate\Http\Request))
#47 {main}
"}

[dinhquochan]

No application encryption key has been specified.

Please setup app.key configuration before you run application. You can run php artisan key:generate to generate new app key.

[SevymolSebastian]

I have already regenerated key and it didn't help! In addition, I have run all the following commands:

composer dump-autoload
php artisan clear-compiled
php artisan config:clear
php artisan route:clear
php artisan view:clear

php artisan optimize
php artisan config:cache
php artisan route:cache
php artisan view:cache
php artisan cache:clear

These didn't helped me either.

[driesvints]

Hey there,

Unfortunately we don't support this version anymore. Please check out our support policy on which versions we are currently supporting. Can you please try to upgrade to the latest version and see if your problem persists? We'll help you out and re-open this issue if so.

Thanks!