BUILD FAILED: while running build.sh /rebuild.sh

[enviz]

BUILD FAILED
/home/dgmain-ind5/Downloads/skg/semantic-knowledge-graph-master/build.xml:68: The following error occurred while executing this line:
/home/dgmain-ind5/Downloads/skg/semantic-knowledge-graph-master/lucene-solr/solr/build.xml:355: The following error occurred while executing this line:
/home/dgmain-ind5/Downloads/skg/semantic-knowledge-graph-master/lucene-solr/solr/common-build.xml:453: The following error occurred while executing this line:
/home/dgmain-ind5/Downloads/skg/semantic-knowledge-graph-master/lucene-solr/solr/contrib/analysis-extras/build.xml:59: The following error occurred while executing this line:
/home/dgmain-ind5/Downloads/skg/semantic-knowledge-graph-master/lucene-solr/lucene/module-build.xml:260: The following error occurred while executing this line:
/home/dgmain-ind5/Downloads/skg/semantic-knowledge-graph-master/lucene-solr/lucene/module-build.xml:150: The following error occurred while executing this line:
/home/dgmain-ind5/Downloads/skg/semantic-knowledge-graph-master/lucene-solr/lucene/common-build.xml:441: The following error occurred while executing this line:
/home/dgmain-ind5/Downloads/skg/semantic-knowledge-graph-master/lucene-solr/lucene/common-build.xml:478: Ivy is not available

Total time: 0 seconds
chmod: cannot access 'restart-solr.sh': No such file or directory
chmod: cannot access 'restart-solr-dbg.sh': No such file or directory
chmod: cannot access 'feed.sh': No such file or directory
chmod: cannot access 'solr/bin/solr': No such file or directory