Hi there,
the BaseSample class has been created to be used in extension workflows and not as standalone apps. It has therefore not been tested for such scenarios. In the current version, this does not work anymore because not every extension is added by default to the pythonpath. Only enabled extensions are added, where the base sample is not enabled by default.
If you still plan to use it in a standalone example you can manually add "omni.isaac.examples" = {} to /apps/omni.isaac.sim.python.kit
Or enable it in the standalone app:
from omni.isaac.core.utils.extensions import enable_extension
enable_extension("omni.isaac.examples")
from omni.isaac.examples.base_sample import BaseSample
from omni.isaac.core import World