The plugin WordPress Popular Posts does not work

Hello @anlino

Unfortunately, The plugin WordPress Popular Posts does not work with the theme.

Widgets can not be added to the topic, so I tried to insert the code directly into the index.php file
For example, this is:

<? PHP
if (function_exists ('wpp_get_mostpopular'))
wpp_get_mostpopular ("range = weekly & order_by = comments");
? >

But the site stops working “HTTP ERROR 500”

Very much I ask for help
I need code that displays the top 10 entries by the number of views with comments.
This code should be displayed at the bottom of each page of the site (you can in the footer)
Thank you!

The page I need help with: [log in to see the link]