Loading config file: /home/sandy/.config/openmw/openmw.cfg... done.
Loading config file: ./openmw.cfg... done.
Loading config file: /etc/openmw/openmw.cfg... done.
Using default (English) font encoding.
Data dir /home/sandy/openmw/Data Files
ERROR: bad lexical cast: source type value could not be interpreted as target
The launcher now asks you too if it finds a Morrowind.ini in the path above your data path, it even asks you which one to import from when it finds multiple.
But please keep in mind, that this only happen on the first run. We should be fine now, but anyone who has run intermediate development builds between 0.21.0 and 0.22.0 may need to manually re-run the importer from the command line (since we don't yet have the feature to run it explicitly from the launcher after the first run).