Use the clear cache command when building projects with laravel version 5.7 or above:

php artisan cache:clear  

Sometimes, the following errors are reported:

“Failed to clear cache. Make sure you have the appropriate permissions”

The reason is that there are two directories. You need to create a new directory.

mkdir -p storage/framework/cache/data

You also need to set directory permissions  

chmod 777 /home/www/dir/bootstrap/cache && amp; chmod 777 /home/www/dir/bootstrap/cache/*

reference resources:

“Failed to clear cache. Make sure you have the appropriate permissions” in Laravel 5.7_ Yang level blog – CSDN blog