Namespace error with ROS and OpenCV4's DNN module - c++

Question

I am encountering a namespace issue when using ROS, OpenCV's dnn module, and CLion. The issue seems to be exclusive to the DNN module, as the other ROS and OpenCV functions work fine. While my code seems to compile and build fine, I am getting the lint error: No member named readNetFromDarknet in namespace 'cv::dnn'. The error happens everywhere I am accessing anything in the DNN module.
Defined in my header file:
cv::dnn::Net net;
yields the error No type named Net in namespace 'cv::dnn'.
Defined in my class file:
void HumanDetector::setupNetwork() {
net = cv::dnn::readNetFromDarknet(MODEL_CONFIG, MODEL_WEIGHTS);
net.setPreferableBackend(cv::dnn::DNN_BACKEND_OPENCV);
net.setPreferableTarget(cv::dnn::DNN_TARGET_CPU);
}
yields a similar problem.
In CLion, however, I can Ctrl+Click any of the alleged undefined members or types and see the source code for them. I suspect that it might have something to do with my CMakeLists config or IDE setup. Here is my cmake file:
cmake_minimum_required(VERSION 2.8.3)
project(followbot)
## Compile as C++11, supported in ROS Kinetic and newer
add_compile_options(-std=c++11)
set(CATKIN_ENABLE_TESTING OFF)
set(OpenCV_LIBRARY_DIR /usr/local/lib)
set(OpenCV_DIR "/usr/local/lib")
## Find catkin macros and libraries
find_package(OpenCV 4.1.2 REQUIRED PATHS /usr/local NO_DEFAULT_PATH)
find_package(catkin REQUIRED COMPONENTS
roscpp
geometry_msgs
std_msgs
message_generation
teb_local_planner
)
add_message_files(
FILES
Point2.msg
)
generate_messages(
DEPENDENCIES
)
###################################
## catkin specific configuration ##
###################################
## The catkin_package macro generates cmake config files for your package
## Declare things to be passed to dependent projects
## INCLUDE_DIRS: uncomment this if your package contains header files
## LIBRARIES: libraries you create in this project that dependent projects also need
## CATKIN_DEPENDS: catkin_packages dependent projects also need
## DEPENDS: system dependencies of this project that dependent projects also need
catkin_package(
INCLUDE_DIRS include
CATKIN_DEPENDS
roscpp
message_generation
message_runtime
std_msgs
geometry_msgs
teb_local_planner
DEPENDS OpenCV
)
###########
## Build ##
###########
## Specify additional locations of header files
## Your package locations should be listed before other locations
include_directories(
include
${catkin_INCLUDE_DIRS}
${OpenCV_INCLUDE_DIRS}
)
## Declare a C++ executable
## With catkin_make all packages are built within a single CMake context
## The recommended prefix ensures that target names across packages don't collide
add_executable(${PROJECT_NAME} src/node.cpp src/cloud.cpp src/human.cpp)
## Link the executable to the OpenCV libraries
link_directories(${OpenCV_LIBRARY_DIR})
target_link_libraries(followbot ${OpenCV_LIBRARIES} ${catkin_LIBRARIES})