ubuntu20. 04 because the system has been upgraded, some useless packages have been automatically uninstalled, and the Carla that can run originally cannot be started and an error is reported:

/opt/carla-simulator/CarlaUE4/Binaries/Linux/CarlaUE4-Linux-Shipping: error while loading shared libraries: libomp.so.5: cannot open shared object file: No such file or directory

Solution:

Try reinstalling the libosm5 package

sudo apt-get install libomp5

After the installation is completed, start Carla again successfully.