Template triplicated?

Hello,

My site is https://www.caae.cl/wordpress

I am still working on it, and today I was changing some stuff. But, suddenly, and without changing any code part of the loop, of the “wp-includes” folder, nor something from my template code, it just started to triplicate every part of the template.
For example, the header is showed 3 times, the sidebar 3, the main part starts, curiosly, from half-a-div declaration, then it repeates, and then the footer is shown. After that, more “main part text” is shown.

I didn’t changed anything particulary important, I went back throught all the changes I’ve made and nothing seem to fix it.

The main question is: can this be a hosting problem, like something with the PHP cache or something like that?
I downloaded all the files and checked them, they’re correct.

Thanks,