Arduino doesn't load in header file

edit

Hi everyone!

We are trying to load in a custom message type in the Arduino IDE. We've been trying to upload it in the /Arduino/libraries folder, and it looks like it's at the right place. We can find the .h file in /Arduino/libraries/ros_lib/<<package_name>>/<<header_file>>. We restarted the IDE a few times to try to get it working but without results. When we try to verify our code it shows the error message:

readEncodersHardware:5:10: fatal error: archer_pkg/Encoderdata.h: No such file or directory
 #include <archer_pkg/Encoderdata.h>
          ^~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
archer_pkg/Encoderdata.h: No such file or directory

Does anyone know if we missed something? Thanks in advance!