Hi!
First I used the included dumpRdf.php to create the RDF file, attached.
Then I did the munge step. It produced the errors, attached.
Notice something weird: in your RDF, the wdata prefix is:
@prefix wdata: http://www.wikidata.org/wiki/index.php/Special:EntityData/ .
Usually it is expected to be http://www.wikidata.org/wiki/Special:EntityData/
Also, if you're running your own instance, you may want to set up a different URL for wikidata prefix by setting conceptBaseUri (see docs/options.wiki). You may then also want to use -w option for munger to set up correct hostname for your setup and also -DwikibaseHost when you're running Blazegraph/updater.