STM32H743 fdcan not sending messages from FIFO

Hello everyone,

I'm trying to use the FDCAN of the STM32H743 using the Tx FIFO. The board correctly receives all messages, but when trying to send them from the FIFO, it fills without sending anything.

This is a piece of the code:

if (HAL_FDCAN_AddMessageToTxFifoQ(&hfdcan1, &pTxHeader, CanPayload) != HAL_OK) // Adding message to Tx FIFO
		{
			printf("Can_Err: Tx vel\n");
		}
		while (!HAL_FDCAN_GetTxFifoFreeLevel(&hfdcan1))
			;

The FDCAN is set as follows:

hfdcan1.Instance = FDCAN1;
	hfdcan1.Init.FrameFormat = FDCAN_FRAME_CLASSIC;
	hfdcan1.Init.Mode = FDCAN_MODE_NORMAL;
	hfdcan1.Init.AutoRetransmission = ENABLE;
	hfdcan1.Init.TransmitPause = DISABLE;
	hfdcan1.Init.ProtocolException = DISABLE;
	hfdcan1.Init.NominalPrescaler = 8;
	hfdcan1.Init.NominalSyncJumpWidth = 8;
	hfdcan1.Init.NominalTimeSeg1 = 31;
	hfdcan1.Init.NominalTimeSeg2 = 8;
	hfdcan1.Init.DataPrescaler = 1;
	hfdcan1.Init.DataSyncJumpWidth = 1;
	hfdcan1.Init.DataTimeSeg1 = 1;
	hfdcan1.Init.DataTimeSeg2 = 1;
	hfdcan1.Init.MessageRAMOffset = 0;
	hfdcan1.Init.StdFiltersNbr = 10;
	hfdcan1.Init.ExtFiltersNbr = 0;
	hfdcan1.Init.RxFifo0ElmtsNbr = 6;
	hfdcan1.Init.RxFifo0ElmtSize = FDCAN_DATA_BYTES_8;
	hfdcan1.Init.RxFifo1ElmtsNbr = 6;
	hfdcan1.Init.RxFifo1ElmtSize = FDCAN_DATA_BYTES_8;
	hfdcan1.Init.RxBuffersNbr = 0;
	hfdcan1.Init.RxBufferSize = FDCAN_DATA_BYTES_8;
	hfdcan1.Init.TxEventsNbr = 0;
	hfdcan1.Init.TxBuffersNbr = 0;
	hfdcan1.Init.TxFifoQueueElmtsNbr = 6;
	hfdcan1.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;
	hfdcan1.Init.TxElmtSize = FDCAN_DATA_BYTES_8;

And the code is generated from CubeMX