Fatal Error: RtError.h no such file of directory. When Testing tutorial code.

[TheConceptBoy]

I'm following the docs tutorials on setting up RtAudio:
https://web.mit.edu/carrien/Public/speechlab/marc_code/ADAPT_VC/rtaudio/doc/html/index.html#start

https://web.mit.edu/carrien/Public/speechlab/marc_code/ADAPT_VC/rtaudio/doc/html/index.html#start

I end up with an error (Working through a VM on a debian project):

So it complains that RtError.h is not found. It's not in the /user/include/ folder either:

Now if I skip try/catch it does seem to compile and run.

[TheConceptBoy]

Now if I switch to using C++ native try catch error instead of RtError class object, it compiles fine.

[TheConceptBoy]

CXX = g++
CXXFLAGS = -Wall
CXXFLAGS += $(shell pkg-config --cflags rtaudio)
LDFLAGS += $(shell pkg-config --libs rtaudio)

OBJ = main.o

%.o: %.cpp
		$(CXX) $(CXXFLAGS) -c $<

app: $(OBJ)
		$(CXX) -o $@ $^ -lrtaudio

clean:
		rm *.o

This is my makefile