2020 Fabrication products have some installer issues if you use Network licensing or build Deployments.
Pathing in the SETUP.INI file points to the wrong location for the NLM.msi
Look for this line in the SETUP.INI file....
Third-Party Component Open Source EULAs:x64\en-US\Tools\NLM.msi
And change to this...
Third-Party Component Open Source EULAs:x86\AdskLicensing\NLM\x64\NLM.msi
Make a backup copy of your SETUP.INI's prior to making this change.
At some point I'd expect them to update the installer files so you may only want to mess with them if you encounter issues.
See attached ZIP for updated SETUP.INI files for CADmep, CAMduct and ESTmep.