The only supported ciphers are AES-128-CBC and AES-256-CBC with the correct key lengths. laravel 5.3
You need to have .env on your appication folder then run:
$ php artisan key:generate
If you don't have .env copy from .env.example:
$ cp .env.example .env
Run php artisan key:generate.
Do php artisan config:clear,
Then php artisan config:cache
And things will start working!
Run this commands on your terminal:
php artisan config:clear
then
php artisan config:cache