@brandon.hay
ignore this error,go to your browser http://your fqdn
and complete the remaining process via snipeit
it will work.
Tested.

@Robblehead
Your fqdn should be like snipeit.abc.new
in your router or host file write a custom dns as
192.168.1.10 snipeit.abc.new
Now from your browser http://snipeit.abc.new
it will work.

When i run the command i got the following error,please help.
[root@oc snipeit]# php artisan app:install
PHP Warning: require(/var/www/html/snipeit/vendor/composer/../aws/aws-sdk-php/src/functions.php): failed to open stream: No such file or directory in /var/www/html/snipeit/vendor/composer/autoload_real.php on line 66
PHP Fatal error: require(): Failed opening required '/var/www/html/snipeit/vendor/composer/../aws/aws-sdk-php/src/functions.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/html/snipeit/vendor/composer/autoload_real.php on line 66