This is not a known issues and the error sounds like it may be a server issue on your side, not ours. Otherwise, there is an issue with your PDF.
. On which screen does the error appear?
. What happens when you EXPORT pdf’s from the plugin’s EXPORT TAB?
Reply to the above to begin a back-and-forth troubleshooting, or complete this form if you’d like us to login to troubleshoot the issue.