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I see that you are having trouble creating your form as a pdf since it is stuck and not working.
After checking on this problem furthermore I believe it is working normally but the problem is that it takes a little while since you have an extremely long form.
On my end with testing this I am able to download your form after about 30 seconds give or take a few more at the most because it takes a bit to build the pdf of it.
Please try this again on your end and if it's still a problem just let us know.