Just spotted a minor quirk here:
It looks like the image is being served from Google, and so might work if the reader is signed into Google.
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Howdy, it me - the one in charge of most (but not all) of our KBs. 
Not sure what broke as nothing changed, but I went ahead and “replaced” it with the same exact image which seems to have it loading correct now.
Apologies for the issues with this & hope it is fixed for you now as well.
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Nice one; that’s fixed it for me too, even with my fussy VPN! 