For older Lumerical versions configure Lumerical to obtain the license from the Ansys “Standard” license on your license server. Apply your changes and Restart the Launcher when prompted.

If you are running the newer versions, edit the License.ini file on your user’s hidden directory and set “domain=2”.
> https://optics.ansys.com/hc/en-us/articles/360025358714-Specify-license-manager-location-non-graphically
License.ini file:
[license]
domain=2
default=user
ansysserver\host=...