ROS noetic: I want to use GNSS data in Rvis, but an error occurs in the catkin build.

First: I started studying ROS about a week ago. I started learning ROS about a week ago. I apologize if this question is elementary. I have git cloned a package that I want to use in ROS, but when I do a catkin build, I get a build error. If anyone has a solution, please let me know.

Environment: Ubuntu 20.04 ROS noetic GNSS receiver module : ZED-F9P

Final Goal: I want to reflect GNSS data in ROS Rvis and use it for autonomous movement of the robot.

Current problem: We performed the procedure with reference to the following site.

Reference site: https://qiita.com/k-koh/items/91d7ea55cbdfc3d3aaf9

Procedure: ~/catkinws/src git clone https://github.com/hakuturu583/gpsrviz_plugin.git cd .. catkin build

When I run catkin build, I get an error like the attached image.

https://www.pinterest.jp/pin/876724252434383610/

I tried changing line 55 in overlaygpsdisplay according to the error message, but when I run build again, I get the error as shown in the attached image.

https://www.pinterest.jp/pin/876724252434383636/

As for the second ERROR, I am not sure if I can change it. Please let me know if you have any solutions.

Also, I have performed the procedure with reference to the following site.

Reference site: https://qiita.com/k-koh/items/8fd8ef6310e4f40fa536

Procedure: git clone https://github.com/KumarRobotics/ublox.git cd .. catkin build

I also get the ERROR as shown in the attached image here.

https://www.pinterest.jp/pin/876724252434383642/

My guess is that it is due to my ROS version being different from the reference site. Is there any way to make GNSS data available in Rvis? I am new to ROS, so I am not very good at asking questions, but I intend to learn more. I hope you can help me.