I have been having this issue. When I make any change in an existing quote template or create a new quote template and edit, after I click save I receive this error code. I cannot save the modifications. Why do I have this problem. The link that is given there does not help there is not anything related to this issue that I could find.

enter image description here

  • 1
    Given this is an internal error, I suggest you open a Salesforce support ticket. – Jeferson Chaves Apr 8 at 15:45