WordPress search doesn't work

I was trying to set up a search for my website (https://dareksaffiliatetips.com) and it just doesn’t work, whenever I try to search for something it display the index.php page. I got the search.php, searchpage.php and searchform.php set up and all that. My friend told me there could be a plugin blocking it or something as there is nothing wrong with the code. I’ve installed Relevanssi to see if it’s gonna do any good but still nothing. I don’t know what else to do. I appreciate any answers.