Send a useful support request
Never send: password, OTP, UPI PIN, full card number, CVV, or an unmasked identity document unless support has provided a secure and necessary method.
A short, specific message usually makes the problem much easier to reproduce and answer.
Download it once more, check that the file size is not 0 KB and try opening it with another suitable app. Include the tool name and file type in your message.
Match the paper selected in AkPrintHub with the printer dialog and choose 100% or Actual size. Turn off Fit to page, headers and footers.
Keep the transaction ID and approximate time. Verify the debit in the payer app and the credit in the receiver account; do not send the UPI PIN or OTP.