Hello @TiaAccountOwner ,
When I checked your legacy landing page link, it loaded up right away on my end. However we have received a few reports of the legacy landing pages taking awhile to load or being stuck perpetually loading. I've marked your account as affected, and submitted it to the engineers for further review (including the link to your site and the LP itself). If and when they have an update regarding this, they'll notify you directly.
For now, I'd advise performing some basic connectivity troubleshooting, to see if you can narrow down on your end what might be interrupting the connection when accessing the link. Please keep in mind that when I say connectivity, I'm not necessarily referring to just your internet speed. There are a number of elements that can affect website connectivity and accessibility on an individual basis.
If that doesn't alleviate the issue on your end, the only other workaround that'd be available would be to use the newer landing pages for your sign up form, or a coded form such as an inline or pop-up form.