Hi all,

Having issues with rl_invoice3(version 3.0.512) and zencart version 1.39h and this is the error message that I am getting:

Fatal error: Cannot redeclare class FPDF in /home/content/o/u/t/outdoorking/html/includes/pdf/fpdf.php on line 13

The pdf invoice stopped working when the update was done in May this year and we are lost for an answer as to why it has happened.

If anyone can help it would be appreciated.