Thank you so much for providing the file with the fix and instructions.
We think your level of support is very good.
I tested the page and it did not let me go to the next accordion with empty fields.
Worked for me. See images. PDF is fine, it does not matter the denomination.
The resolution needs to be FAST, she just emailed me again that another client of her's had the same problem, this is bad.
Here is the .htaccess in text form, does that help? Please refer to the error I listed above.
We found the error... says too many redirects?
Here: [16-Dec-2016 18:51:17 UTC] PHP Warning: MarketPress was unable to download the file http://sunharvest.ca/wp-content/uploads/2016/02/Gift-Certificate-50.pdf for serving as download: Too many redirects in /home/sunharvest/public_html/wp-content/plugins/marketpress/includes/public/class-mp-public.php on line 582