Not able to build CPP example

Hi,

I have a problem on building the C++ example

-- Build files have been written to: /home/jan56580/Documents/dev/flower/examples/quickstart-cpp/build/_deps/flwr_repo-subbuild
[ 11%] Performing update step for 'flwr_repo-populate'
[ 22%] No patch step for 'flwr_repo-populate'
[ 33%] No configure step for 'flwr_repo-populate'
[ 44%] No build step for 'flwr_repo-populate'
[ 55%] No install step for 'flwr_repo-populate'
[ 66%] No test step for 'flwr_repo-populate'
[ 77%] Completed 'flwr_repo-populate'
[100%] Built target flwr_repo-populate
-- Configuring done
CMake Error at CMakeLists.txt:55 (add_library):
  No SOURCES given to target: flwr
```

flwr is installed with Python.

I added some messages to check the path. Hope that helps see a problem

-- FLWR_SDK_PATH: /home/jan56580/Documents/dev/python/quickstart-cpp/build/_deps/flwr_repo-src/src/cc/flwr
-- Error listing contents of /home/jan56580/Documents/dev/python/quickstart-cpp/build/_deps/flwr_repo-src/src/cc/flwr/src:
-- ls: cannot access '/home/jan56580/Documents/dev/python/quickstart-cpp/build/_deps/flwr_repo-src/src/cc/flwr/src': No such file or directory

-- Error listing contents of /home/jan56580/Documents/dev/python/quickstart-cpp/build/_deps/flwr_repo-src/src/cc/flwr/include/flwr/proto:
-- ls: cannot access '/home/jan56580/Documents/dev/python/quickstart-cpp/build/_deps/flwr_repo-src/src/cc/flwr/include/flwr/proto': No such file or directory

-- FLWR_SRCS: 
-- FLWR_PROTO_SRCS:

Hi @neonduck, could you please confirm what version of flwr you are using?

The current stable release.