Website not working on iPad?

Hello, I'm currently creating a website for a school project. After many problems, I thought I had completed the hardest part.

I test my website on my PC, and it runs perfectly. There are no issues even at different sizes or on mobile.

Then, when I tried to test it on my iPad, the icons suddenly wouldn't load . And even worse, without me having changed anything, a menu no longer works, even though it worked yesterday.

When I simulate the website on my PC as an iPad (via DevTools) it works normally.

Here is the website if anyone needs it: https://atheser.netlify.app/

Does anyone know what could be causing this?

Thanks for any help!