When attempting to print expense report with pdf receipt, the page goes to error message

Summary:

Certain users are unable to print their expense reports from expenses application because when they do, the page spins for a while trying to load and then goes to a white page with an error message. I have been able to replicate the error, and it looks like it is due to a PDF receipt being attached. The same thing happens when I try to print from audit expense report area and print with attachments. Has anyone seen this issue before? Is this a bug?

Content (please ensure you mask any confidential information):

Error Message shown below. Each time a different reference number shows but the error message remains the same.