UART_EVENT_ERR_OVERFLOW in UART Comminication

Hi Everyone;

I am trying to communicate with Uart. But I am encountering such an error. What could be the reason for this?

I see the same error when I activate FIFO Support. The difference between activating and not activating FIFO Support is that when FIFO Support is active, the error occurs after a while. What does FIFO Support do?

Thank you in advance.

Regards.
guurii