I have created a Muse website, www.riviera-web-design.net, with 6 break points including one for iPad. The site seems ok on desktop, but on iPad I get a white screen. I can enter a different page on iPad and get in, then go back to my index.html page and it works ok. So why can I not access it straight from the website name?
That typically points to one of the scripts not initializing or being suppressed based on the device detection and then the whole structure may collapse. Difficult to detect such stuff, so you may want to spend some time in your desktop browser's debug console and turn on mobile device emulation to check for page rendering and script errors.