website not working on mobile, showing a white screen.

This is apparently only not possible with Chrome-based browsers on mobile devices. I don’t see a clear error in the browser, but I can understand what you’re seeing. The reason is that the preloader is never removed. You would have to deactivate it. However, how to do this probably depends on your theme. I would recommend that you contact their support forum if you have any further questions: https://www.ads-software.com/support/theme/purea-magazine/