RAK3172 SubGHZ_Phy TxTimeout Error, how can ı solve it?

[Andorlatch]

Hello guys, I am trying to make a P2P LoRa Communication with SubGHZ_Phy SDK. I have two boards, one is STM32WL dev. board and RAK3172 Custom Board.

When I use SubGhz SDK STM32WL works but with RAK3172 problem appears for (TxTimeout). What is this? How can I solve it_?