16:48:35 During initialization the error "[Errno 2] No such file or directory: '"/usr/bin/freecad" -m pip install "/home/user/.FreeCAD/Mod/InventorLoader/libs/xlrd-1.2.0.tar.gz"'" occurred in /home/user/.FreeCAD/Mod/InventorLoader/InitGui.py
16:48:35 Please look into the log file for further information
I first attempted to install using the addon manager but it reported an error with dependencies (not specifying which).
Then I went to the ~/.FreeCAD/Mod directory and did: git clone https://github.com/jmplonka/InventorLoader.git
I started FreeCAD and got this error: