I just hit the same error. Initially I got it on the beginning of installation (both netaddr and jmespath were not found). Seems that python3.9 is used so initially I solved it via pip3.9 install. Alternatively you can get the rpm packages from epel. The same issues is on ovirt VM side. As a workaround I started deployment with pause (hosted-engine --deploy --ansible-extra-vars=he_pause_host=true). With that you can ssh to the instance, and manually run pip install which got me: 'Successfully installed jmespath-1.0.1 netaddr-0.8.0'. This is just a workaround and proper fix should be reflected in engine VM image, or on the repos side.