GraphExtractGroups config setting is ignored

[FrankPreusker]

The config contains a line to (de)activate the extraction of group members:
"GraphExtractGroups": "false"
The script "Fetch - Graph.ps1" is testing the value, eg on line 155:
if ($config.GraphExtractGroups)
Whatever value is used in the config file, it always triggers the above if statement. It is likely interpreted as a string value instead of Boolean.