Hello,

Please check the `APP_KEY ` in `.env` and it should be something like like below

```
APP_KEY=base64:Bnpq0VnnqvBJx4ShK/CBqR32MWYOHCx50mZeqdKgwPE=
```

Sometimes, install appends 2 keys to the value, you can remove one and try. If your are not sure, you can set `APP_KEY=` empty value and run `php artisan key:generate --force`

Thank you