Initian import / allow_url_fopen
The initial import stops without a note, what was going wrong, with PHP setting allow_url_fopen=0
That's because of this line:
in file Library/wurfl-dbapi-22.214.171.124/TeraWurflUtils/TeraWurflUpdater.php
Perhaps you could check for this PHP setting in the Backend Module and, if the setting is turned off, you could show a warning.