On enabling the app, I get
{"app":"index","message":"Doctrine\DBAL\DBALException: An exception occurred while executing 'SELECT tagid,descr,public,color FROM oc_meta_data_tags WHERE descr LIKE ? AND owner LIKE ?':\n\nSQLSTATE[42S22]: Column not found: 1054 Unknown column 'public' in 'field list'","level":4,"time":"2015-03-30T18:24:07+00:00"}