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No data transmission and reception

I am currently working with the sx1261 de. I have everything working, from spi commands to reading registers. But when I want to Tx the 23 byte join message, nothing happens. And the other way arround when setting the board in RX nothing happens. While there are older modules sending data. It is like the boards antenna is not working... Is there may be something obvious I am missing? I am developing on a stm32L5 nuceleo board.
Kind greetings,
Daniël Mul