I was able to reproduce the same error without expanding the folder hello-worldin the instance . I just downloaded the latest version of Magnolia and the welcome world.
Most likely, you did not expand the folder hello-world(I downloaded and unpacked the full sample from the Magnolia widget site) before <magnolia-5.4.7>/apache-tomcat-7.0.64/webapps/magnoliaPublic, but only before <magnolia-5.4.7>/apache-tomcat-7.0.64/webapps/magnoliaAuthor.
! - Magnolia, () - , hello-world, Magnolia , . magnoliaAuthor magnoliaPublic , , , .
( Tomcat .)
