Loader-wrapper stuck when I upload the LP to the host

I have a problem concerning a landing page I want to upload to my host. Before entering the landing page, a loader shows up then you get redirected to the landing page, however in my case, the loader is stuck and cannot redirect. However, when I open the index.html file with chrome, everything works fine. So as I deducted, the problem persists when I upload the files to my website. I tried to delete the wrapper section from the css and index.html files but nothing. Please do ask for more info if you want as I don't know what I should provide you with.

Here's how it looks

Here's how it should look