Disqus does not load on site

I have a website in Wordpress. Which, does not load the comments in any post (in this case, would be the single.php file). In the console, the message:

  

The resource link was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it is made sure that it has an appropriate as value and it is intentionally preloaded.   (index): 1 The resource link was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it is made sure that it has an appropriate as value and it is intentionally preloaded.   (index): 1 The resource link was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it is made sure that it has an appropriate as value and it is intentionally preloaded.   (index): 1 The resource link was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it is made sure that it has an appropriate as value and it is intentionally preloaded.

What can it be?

I have already disabled all the plugins and left only Disqus active and it still does not work.