This issue is already reported to our engineers, Christophealfaro.
They're currently investigating the cause of the error. A fix will be rolled out as soon as possible.
I suggest reaching out to our customer care support. We're taking notes of the users that are affected by this issue. Here's how:
- Click Help inside QuickBooks Online.
- Select Talk to a human.
- Enter "PDF error when printing invoices by batch" in the Type something field.
- Click I still need a human.
- Select Contact us.
- Click either Messaging or Callback.
In the meantime, you can print one invoice at a time. Once it's fixed, you can go back and print them by batch.
The Community is open 24/7. Get in touch with us if you have other concerns.