Error associated with missing RingBuffer definition

[johnosbb]

Arduino_TensorFlowLite\src\tensorflow\lite\micro\system_setup.cpp:68:39: error: expected '{' before '<' token
Arduino_TensorFlowLite\src\tensorflow\lite\micro\system_setup.cpp:68:39: error: expected unqualified-id before '<' token
Arduino_TensorFlowLite\src\tensorflow\lite\micro\system_setup.cpp:73:20: error: aggregate 'test_over_serial::_RingBuffer test_over_serial::_ring_buffer' has incomplete type and cannot be defined

I checked and RingBuffer.h appears to be defined for the Pico, but not other boards.
I am building for the Pico. Any solution to this?