尝试在子目录上安装脚本时出现403禁止错误

I have my own server which I run a few sites from. I have sub-directories that link to full domains (/music points to -> www.music-site.com)

My problem is I am getting a 403 forbidden error with a script I have installed to another sub-directory.

.htaccess file is as follows:

<IfModule mod_rewrite.c>
<IfModule mod_negotiation.c>
    Options -MultiViews
</IfModule>

RewriteEngine On

# Redirect Trailing Slashes...
RewriteRule ^(.*)/$ /$1 [L,R=301]

# Handle Front Controller...
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [L]

If it makes any difference, the script I am trying to install is based on laravel and bootstrap frameworks.

Does anyone know the issue?