Opencart not sending order confirmation to admin email and customer

Hello there
I'm using OC 3.0.2.0

I have a serious problem where my admin email doesn't receive any email when there's any order made.
i have fill the email in the Settings-> Store tab -> Email and i can guarantee i use the correct email
i have also check the Orders option in the Settings -> Mail tab -> Alert mail

but there's nothing i receive when any customer makes an order.
Anyway to fix it?

Thanks

Just found the solution for my problem

Here is the link
viewtopic.php?t=182212#p667810

thanks