500 Internal Server Error

I have a problem with kunena template.
I got SSL certificate so I noticed that there were many error and warning.
Kunena did HTTP calls and not HTTPS .
I found results only in initialize.php so I decided that I install NTS kbento again .
I did not do uninstall because here 3:25 am and I wanted to sleep.
After new installing I got 500 Internal Server Error on forum
What can I do?

Hi smoothie,

Can you provide us the back-end account of your site? We will try to help you solve this issue. Please send us via support email 9themestore@gmail.com.

Thanks