Hello Michael,
Thanks for contacting us about getting your site to display on mobile, I pulled up the site on my device and did not see any errors or anything standing out, I do have a larger screened phone, however, What is not displaying properly for you on the site? When editing in the customize section and in the page editor you will have icons that look like a monitor, tablet, and phone, You can click on them to have it simulate those devices when you are editing pages so you can get an idea of how it will look on a mobile device so you can arrange content to look the way you would like on mobile devices too.
Best Regards,
Kyle M