Great, thanks for confirming! Sorry it took this long.
The bug was related to fractional page sizes (in pixel units), with the workaround to round up/down page sizes to whole numbers. With the bug fixed, that workaround should not be needed.
Your colleague Tarun Saini earlier asked me to resize the pages, and after I did that, it did publish. I have just tried that again, and it worked perfectly!
I hope this resolves the issue for others as well.
Does it say "Unable to publish at this time: Please try later"? I have had this error happening since last October: eventually it was picked up by an Adobe employee in this forum, who replicated the error when I sent him a copy by email. He said he had forwarded it to the Development Team, but I have heard nothing since, and the error has not gone away. Not a lot of point of Express if you can't publish. I will stick to PDFs!