The error can be caused by many issues. If we are able to login it would be the fastest way to find/fix the issue, provide credentials here, if possible.
If login is not possible, use the link above to send the PDF to us for testing. Also include a screenshots of;
– The complete field map layout.
– The PRO2PDF shortcode (On Submit Message Box or Email Action Message).
– The SETTINGS tab and the UNDER THE HOOD tab.
To troubleshoot by forum messages, provide the screenshots requested above, as well as answers to the following to begin the process;
– Has any merge with any form worked on your server?
– Are you able to Export a merged form from the plugin’s EXPORT tab?
– How many fields are in the merge?
– Are there any signature or image fields in the merge?
– Try creating a merge with only one field and test, if it works add additional fields and test until you find the issue causing field and let us know.