Step 4: Install Python 3.8 for Hue
Certain services, such as Hue, in CDP 7.1.8 and higher use Python 3.8. You must install Python 3.8 on all the hosts running the affected services after you have installed Cloudera Manager and before adding the services to your cluster.
Ubuntu 20 comes preinstalled with Python 3.8. You must install Python 3.8 manually on CentOS 7, RHEL 8, SLES 12, and Ubuntu 18.