Hi,
Experts have already provided solutions & its root cause.
I have one question - in your Company are there any invoices processed prior to today ? If yes then check with your functional or technical team whether any customization or development taken place related to MIRO transaction ? Probably some changes might have done thus today it got broken ?!
Also we see that in MIRO transaction you are selecting 'invoice reduction training' layout and check are there any other layouts available.. if yes then try to process by selecting other layouts and see whether you are able to process invoice.
Regards,
Krish
