When exporting cell we get: UnboundLocalError: local variable 'module_mapping' referenced before assignment

[skoulouzis]

[E 2022-07-10 18:41:29.496 SingleUserNotebookApp web:1789] Uncaught exception POST /n-a-a-vre/user//vre/containerizer/addcell?1657478488516 (10.32.0.1)
    HTTPServerRequest(protocol='https', host='', method='POST', uri='/n-a-a-vre/user//vre/containerizer/addcell?1657478488516', version='HTTP/1.1', remote_ip='10.32.0.1')
    Traceback (most recent call last):
      File "/opt/conda/lib/python3.9/site-packages/tornado/web.py", line 1704, in _execute
        result = await result
      File "/opt/conda/lib/python3.9/site-packages/jupyterlab_vre/component_containerizer/handlers.py", line 200, in post
        build_templates(cell=current_cell, files_info=files_info)
      File "/opt/conda/lib/python3.9/site-packages/jupyterlab_vre/component_containerizer/handlers.py", line 331, in build_templates
        module_name_mapping = load_module_names_mapping()
      File "/opt/conda/lib/python3.9/site-packages/jupyterlab_vre/component_containerizer/handlers.py", line 325, in load_module_names_mapping
        loaded_module_name_mapping.update(module_mapping)
    UnboundLocalError: local variable 'module_mapping' referenced before assignment