I just got the below error while building the gazebo animatedbox tutorial.

========================================================== ed@note20:~/gazeboanimatedboxtutorial/build$ make [ 0%] Linking CXX executable integratedmain c++: error: sdformat9::sdformat9-NOTFOUND: No such file or directory make[2]: *** [CMakeFiles/integratedmain.dir/build.make:136: integratedmain] Error 1 make[1]: *** [CMakeFiles/Makefile2:80: CMakeFiles/integratedmain.dir/all] Error 2

make: *** [Makefile:84: all] Error 2

I already install the sdformat9 in my ubuntu 20.04. I don't know why it cannot find sdformat9. So, could anyone can help it? thanks.