Delete the small Raleway text above the bottom images. Save as a new version. Try an export. It should work.

Re-create that small text one caption at a time and try an export each time. FWIW, Also do not use an outline to create a heavier font style. Just use one of the heavier Raleway weights. That's what they are for.

There are things about the file I do not understand. There is no bleed though the background hits the page edges at top and bottom. Because of the 0.44" in the page dimensions, I don't know if that was being planned as a trim for the bleed.

I also do not understand why the filename indicates 8 foot length, but the page itself isn't. I would also recommend converting the background to an image (at least once the page size is checked) and then using the cropping (double-click ont he image, drag the sides in). It doesn't need to be per se, but it will cut down on all the stuff that your Xara application has to toss away when it creates the PDF.

Mike