Welcome back @asm_pro !
It seems like the attachment field needed for the QR code maker is not accepted for the automations.
“Field “Attachments” cannot accept the provided value: Invalid attachment ids.”
If you choose to do it manually for several records, you can tick the box of the first record, press and maintain Shift and click on the last record, this will select them all. Then click on the button Generate QR codes directly from the side window extension without the need to expand the view to save time.