That was a minute ago from my phone.
It's the same result I've got using multiple browsers, from different locations (France , Canada, Switzerland, India) on different phones / tablets / laptops.
It's clearly got nothing to so with my account (which is in good standing, I'm Ambassador), simply because I can't even get to the transfer page.
And calling Marriott has been of no help, because I simply got a garbage copy paste response on how to do a transfer ( I know how, but I can't even get to the page!).