There are missing options under Administration > Knowledge.
It should look like this:
Release : 17.3
Component : SDM - Configuration
NX_KT is not set or has invalid values
Install the NX_KT option and set value to Yes by running:
pdm_options_mgr -c -s KT -v Yes -a pdm_option.inst
pdm_options_mgr -c -s KT -v Yes -a pdm_option.inst -t