Aside from the humor of that page failing to load for me (Firefox), I also smirk at the fact that it would still be projecting the globe onto a _flat_ screen to view it (:
Something different about having an actual ball in your hands.
Hm. Page loads fine for me in Firefox. Has for years (unlike google maps itself where oddly I get blocked for their 3d mode, even when that same mode works fine on earth.google.com)
If you're on Linux, maybe check your drivers, or do webgl.force-enabled layers.acceleration.force-enabled ?
I tried again in a 'blank' profile, and it worked there.
On the failing one, I see some HTTP/3 400 results from "earth-pa.clients6.google.com" before it goes into an infinite-spinner state. On the working profile, those requests succeed. Turned off uBlock and such, still no dice. Maybe some weird thing relating to having a logged-in gmail account on that profile? No idea, really.
But clearly not OS/driver related, since it works in the other profile.
Are you using "resist fingerprinting" in Firefox? I've noticed that causes mystery total blocks or additional "click and hold to show you are not a bot" challenges on many sites (Fedex, Kickstarter, Walmart, Lowes) and at random. Often it seems in some backend XHR that the app writer didn't think to handle bot blocks on, so the page half loads.
[1] https://earth.google.com/