Laravel Run Error runtimeexception No application encryption key has been specified.

① place the. env file in the project root directory

. env

App_name=laravel
app_env=local
app_key=
app_debug=true
app_log_level=debug
app_url=http:// localhost

db_connection=mysql
db_host=127.0.0.1
db_port=3306
db_database=homestead
db_ Username=homestead
db_password=secret

broadcast_driver=log
cache_driver=file
session_ Driver=file
session_lifetime=120
queue_driver=sync

redis_host=127.0.0.1
redis_password= Null
redis_port=6379

mail_driver=smtp
mail_host=smtp.mailtrap.io
mail_port=2525
Mail_ Username=null
mail_password=null
mail_encryption=null

pusher_app_id=
pusher_app_key=
pusher_app_secret=

② run in project directory:

PHP Artisan Key:generate

The command generates App_key and writes to the. env file, re-run