Notworking AJAX gadget now, previously worked for years

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A beautiful Gadget, with like kids jumping rope, in my blogger blog which used AJAX, not working now. Worked awesome for years. Don't know why !
Any help, to make it work, please ?
Regards

Link to ref blog page : https://ifindi.blogspot.com/p/related-comments.html

Source of code from Blog : http://www.blogdoctor.me/2009/01/random-rotating-post-gadget-with.html#comment-form