ROS2 Foxy UR Driver: Install Error - transmission_interface package

This error occurs in a repeatable manner. I tried to install several times from scratch. Every time fails for the same package. Below error message indicates there is a bug in the source code “simple_transmission_test.cpp”. Installed on the UBUNTUS 20.04 Server and ROS2-Foxy. Debian.
— stderr: transmission_interface
/home/kjnam/workspace/ros_ws_foxy_ur_driver/src/src/ros2_control/transmission_interface/test/simple_transmission_test.cpp:162:25: error: expected constructor, destructor, or type conversion before ‘(’ token
| ^
make[2]: *** [CMakeFiles/test_simple_transmission.dir/build.make:63: CMakeFiles/test_simple_transmission.dir/test/simple_transmission_test.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:182: CMakeFiles/test_simple_transmission.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs…
make: *** [Makefile:141: all] Error 2

Failed <<< transmission_interface [44.9s, exited with code 2]
Aborted <<< controller_interface [52.1s]

Summary: 13 packages finished [6min 9s]
1 package failed: transmission_interface
1 package aborted: controller_interface
1 package had stderr output: transmission_interface
20 packages not processed