When the hotel screens cannot do something, they say why, and nothing is recorded: no payment, no invoice, no half-finished change. The message names what is missing and, where it can, offers a button to the screen that fixes it. Fix that, then do the action again.
Your cashier shift is not open; the payment method has no account; Accounting's receipt numbering or fiscal year does not cover today
Check-out is refused
A charge's product or sales ledger is missing; VAT or service charge terms are not chosen; invoice numbering; no main store; a store is short of an item
Take a screenshot of the whole screen, with the message and the business date at the top, and note what you were doing (the guest, room or folio). Send it to the person who supports Penahak for your hotel. Nothing was recorded, so you can safely try again once the cause is fixed.