If there is no. Env in the root directory of the file

1. Change the name of. Env.example and use the command copy to. Env

2

php artisan key:generate Get the password and save it to. Env automatically

3. Copy the password to config/APP

Key in PHP

4. Rerun, OK

In case of. Env, proceed to the second step directly

Neither. Please re-install laravel

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