`make_indicators` produces error in a new data folder

[temeddix]

concurrent.futures.process._RemoteTraceback: 
"""
Traceback (most recent call last):
  File "C:\Users\temed\miniforge3\envs\solie\Lib\concurrent\futures\process.py", line 261, in _process_worker
    r = call_item.fn(*call_item.args, **call_item.kwargs)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\temed\Documents\GitHub\solie\module\recipe\make_indicators.py", line 56, in do
    exec(indicators_script, namespace)
  File "<string>", line 20, in <module>
TypeError: unsupported operand type(s) for /: 'NoneType' and 'NoneType'
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\temed\miniforge3\envs\solie\Lib\site-packages\apscheduler\executors\base_py3.py", line 30, in run_coroutine_job
    retval = await job.func(*job.args, **job.kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\temed\Documents\GitHub\solie\module\worker\transactor.py", line 1146, in display_lines
    indicators = await core.event_loop.run_in_executor(
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: unsupported operand type(s) for /: 'NoneType' and 'NoneType'