Facing issue with "Failed to allocate buffer for procedure"

I am trying trilateration for indoor positioning system with nrf54l15, using 3 initiators and a reflector I was not able to switch between initiators and also one of the initiator is giving this error  "Failed to allocate buffer for procedure". Kindly help me resolve this and are there any suggestions for implementation of trilateration using 3 initiators and a reflector.

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