Protocol error

[GregCornis]

I have a raspberry pi 5 connecter to a Skyport V2 (via developper board) to a M300. I'm running the PSDK sample code, which compiles fine, but the program fails to run the negociation and fails.
Do you have any idea what the problem might be ? Is it an issue with a configuration ?

Here are the logs

'Logs/latest.log' -> 'DJI_0018_20240927_17-18-51.log'
[0.004][core]-[Info]-[DjiCore_Init:106) Payload SDK Version : V3.9.1-beta.0-build.2090
[0.341][adapter]-[Info]-[DjiAccessAdapter_Init:231) Identify aircraft series is Matrice 300 Series
[0.341][adapter]-[Info]-[DjiAccessAdapter_Init:264) Identify mount position type is Payload Port Type
[0.342][adapter]-[Info]-[DjiAccessAdapter_Init:365) Identity uart0 baudrate is 460800 bps
[0.347][adapter]-[Info]-[DjiPayloadNegotiate_Init:243) Waiting payload negotiate finished.
...
[10.050][linker]-[Warn]-[DjiProtocol_v1Unpack:187) protocol frame crc16 error, exp:0x1E3D cur:0x0D73
[10.348][adapter]-[Info]-[DjiPayloadNegotiate_Init:243) Waiting payload negotiate finished.
[10.545][linker]-[Warn]-[DjiProtocol_v1Unpack:187) protocol frame crc16 error, exp:0x5D12 cur:0x0D83
...
[51.050][linker]-[Warn]-[DjiProtocol_v1Unpack:187) protocol frame crc16 error, exp:0x6369 cur:0x1329
[51.352][linker]-[Error]-[DjiCommand_SendAsyncHandle:975) Command async send error 0
[51.352][linker]-[Error]-[DjiCommand_SendSync:550) sendSync callback timeout
[51.352][adapter]-[Error]-[DjiPayloadNegotiate_RemoveDeviceSync:1170) remove device sync se[51.352][adapter]-[Error]-[DjiPayloadNegotiate_RemoveDeviceSync:1170) remove device sync send error:0x000000E1.
[51.352][adapter]-[Error]-[DjiPayloadNegotiate_Init:255) Payload negotiate remove device sync error:0x000000FF
[51.352][adapter]-[Error]-[DjiAccessAdapter_Init:381) Payload negotiate error, returnCode = 255
[51.352][core]-[Error]-[DjiCore_Init:126) Access adapter init error, stat:255
[51.352][user]-[Error]-[main:131) Core init error