Undefined reference to VCS_OpenSubDevice' and VCS_CloseSubDevice'

[ahkub]

Dear all,
I use ROS1 Noetic with Ubunto 20.04.6 LTS.
I have downloaded and installed the latest Maxon Library from "https://www.maxongroup.com/maxon/view/product/control/Positionierung/546714".
It is Version 6.8.1.0, not Version 6.7.1.0, as suggested by @Roboprotos in Jan 2022.

I git clone maxon_epos_ros.
Then I do this fix: "<build_depend>maxon_epos_driver</build_depend>
that line should be added in the package.xml file inside the maxon_epos_example package"

When I then run catkin_make, it throws this error:

---

[ 97%] Built target maxon_epos_example_node
/usr/bin/ld: /home/ahkub/Desktop/WorkHere/catkin_ws/devel/lib/libmaxon_epos_driver.so: undefined reference to VCS_OpenSubDevice'** /usr/bin/ld: /home/ahkub/Desktop/WorkHere/catkin_ws/devel/lib/libmaxon_epos_driver.so: undefined reference to **VCS_CloseSubDevice'
collect2: error: ld returned 1 exit status
make[2]: *** [maxon_epos_ros/maxon_epos_driver/CMakeFiles/maxon_bringup.dir/build.make:103: /home/ahkub/Desktop/WorkHere/catkin_ws/devel/lib/maxon_epos_driver/maxon_bringup] Error 1
make[1]: *** [CMakeFiles/Makefile2:1479: maxon_epos_ros/maxon_epos_driver/CMakeFiles/maxon_bringup.dir/all] Error 2
make: *** [Makefile:141: all] Error 2
Invoking "make -j8 -l8" failed

---

Can somebody please help?
Or maybe somebody knows where I can still download EPOS-Linux-Library-En.zip in the old Version 6.7.1.0?

Much appreciated!