403 Forbiden on creating invoice

Help. Getting a 403 error, when I creating the invoice. Fresh default install via softaculious.

Checkout ownership and file permissions. Also do refer apache log.
Here is the documentation about it.

but i’m only one user and I’m admin. Index.php is set to 777

I found a problem. It was a problem with ModSecurity. Admins change rules and now I can create invoice.