@ fiberhopllc Wrong answer, see http://laravel.com/docs/master/upgrade#upgrade-5.1.0.

You must change the 'cipher' => 'AES-256-CBC' in /config.app.php

Also it's possible that APP_KEY is not set in .env

bhargav3 said:

Also it's possible that APP_KEY is not set in .env

+1!!

Thanks!

bhargav3 said:

Also it's possible that APP_KEY is not set in .env

This solution solved my problem too. Thanks...

I simply solved it by running: $ php artisan key:generate

sebastianstoll97 said:

I simply solved it by running: $ php artisan key:generate

+1!

sebastianstoll97 said:

I simply solved it by running: $ php artisan key:generate

+1! Thanks

sebastianstoll97 said:

I simply solved it by running: $ php artisan key:generate

+1! Thanks

$ php artisan key:generate

$ php artisan config:clear

then

$ php artisan config:cache