Newick supports node names in two formats : quoted and unquoted labels. UGENE can correctly parse files only with unquoted labels.
Link to format defenition: http://wiki.christophchamp.com/index.php/Newick_phylogenetic_tree_format
Steps to reproduce:
1. Open attached file
Expected state: tree view appeared
Current state: "Select Correct Document Format" appeared without opportunity to select "Newick" format