I created a form using Adobe Acrobat 9. I added a java script in the background to alert the user of any fields that were not filled out, including multiple signature lines. I tested the form frequently, using Acrobat 9, pro and reader DC, and it worked perfectly. Now I am getting reports from the users(using Adobe Acrobat Reader DC), that they are getting an error message stating that the signature lines need to be populated when the lines have the signatures inserted already.

All users using the latest version of Adobe Reader DC, this issue occurred after the latest update.