Problem with <class 'AttributeError'>: 'NoneType' object has no attribute 'Objects' during the installation

[Krounet]

Hello,

I'm testing OpenEMS and i would like to test FreeCAD-OpenEMS-Export. During the installation I got this message in the FreeCad console :

12:42:20 APP_CONTEXT set to FreeCAD 12:42:20 No Blender interface available. 12:42:20 No Blender interface available. 12:42:20 No Blender interface available. 12:42:20 No Blender interface available. 12:42:20 No Blender interface available. 12:42:20 No Blender interface available. 12:42:20 No Blender interface available. 12:42:20 No Blender interface available. 12:42:20 Traceback (most recent call last): File "C:/Users/mathi/AppData/Roaming/FreeCAD/Macro/FreeCAD-OpenEMS-Export.FCMacro", line 27, in <module> dlgPanel = FOE_mod.ExportOpenEMSDialog() File "C:\Users\mathi\AppData\Roaming\FreeCAD\Macro\FreeCAD-OpenEMS-Export/ExportOpenEMSDialog.py", line 181, in __init__ self.initLeftColumnTopLevelItems() File "C:\Users\mathi\AppData\Roaming\FreeCAD\Macro\FreeCAD-OpenEMS-Export/ExportOpenEMSDialog.py", line 1165, in initLeftColumnTopLevelItems items = self.cadHelpers.getOpenEMSObjects(filterStr) File "C:\Users\mathi\AppData\Roaming\FreeCAD\Macro\FreeCAD-OpenEMS-Export\utilsOpenEMS\GuiHelpers\CadInterface.py", line 66, in getOpenEMSObjects currentObjects = self.getObjects() File "C:\Users\mathi\AppData\Roaming\FreeCAD\Macro\FreeCAD-OpenEMS-Export\utilsOpenEMS\GuiHelpers\FreeCADHelpers.py", line 86, in getObjects return FreeCAD.ActiveDocument.Objects <class 'AttributeError'>: 'NoneType' object has no attribute 'Objects'

I put the files in the FreeCad macro repertory like this :

My FreeCad version is 0.20.2.

Someone had already this issue before ?