Hi KarynL88 ,
Thank you very much for your post.
I apologise you have an issue on your site. However, it seems a one off incident so we can only assume there will be some incompatibility in your site. What is causing it may be more simple to find out than you think.
I assume when you only activate WooCommerce and ATUM, nothing happens, right? If that is the case, start with this setup. Then activate the theme and then plugins one by one. Have you done it this way?
Let me know.
Pavel