You can create your device configuration by pasting the following code snippet at the bottom of the script that defines your bulk configuration:
from NL.CommonConcepts.Configurations.DeviceFromBulk import deviceFromBulk, findBothElectrodeLengths
device_configuration = deviceFromBulk(
electrode_lengths=findBothElectrodeLengths(bulk_configuration) * Angstrom,
bulk_configuration=bulk_configuration,
enable_minimal_electrodes=True,
enable_transverse_electrode_repetitions=False,
)
The issue in Nanolab will be resolved in the R-2020.09 release scheduled for September 8.