COLCON build fail!

Hi,

I have cloned this repo and build it, but it gives me a fatal error?
Do you have any idea how to solve it, it will be very much appreciated?

I am using ubuntu 20.04 (foxy) and installed everything correctly like in the documentation?

![image](https://user-images.githubusercontent.com/61140897/202912403-9f25fd88-ae28-4191-bbe8-026f02142413.png)

