Opened OK for me, but I am using Safari 9.0.2. with OS X 10.10
I see you are in 10.9 with an old version of Safari. There can be issues with the web page that an your version of Safari cannot handle.
Why do you not want to upgrade Safari (only)?
On a Mac since 1984.
Currently: 24" M1 iMac, M2 Pro Mac mini with 27" BenQ monitor, M2 Macbook Air, MacOS 14.x; iPhones, iPods (yes, still) and iPads.
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