Launched reindexing on the Bitrix website for the entire site. The site is now not loading and gives a 504 Gateway Timeout error. How to fix?

Question

1C-Bitrix

Colleagues, good afternoon! I wanted to exclude an inactive section of products in the catalog from the search. To do this, I inserted the code from the topic into document php_interface/init.php: work011.blogspot.com/2017/03/blog-post_29.html
Further, it was recommended to start indexing. I started indexing the entire site and since then the site has not been displayed! Now, when you try to access the site, it starts loading and at the end gives a 502 Bad Gateway error.
What to do? How to start the site again if I can't even get into the admin panel?