The only supported ciphers are AES-128-CBC and AES-256-CBC with the correct key lengths. laravel 5.3

Question

I installed a new fresh copy of Laravel 5.3 using composer but I\'m getting this error:

The only supported ciphers are AES-128-CBC and AES-256-CBC wit

Answer 1

I also had this issue. I check my environment variable value for "APP_KEY" using echo $APP_KEY For me it was "lumen" which was set for another lumen project and that's why it was not working.

I updated "APP_KEY" value using export APP_KEY=[you app_key value from .env file] and cleared cache php artisan config:cache and it worked for me.