transcribe crashed with ElementNotFoundError in __init__(): scaletempo

opened a 3gp file, transcribe failed to start

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: transcribe 11.06~raring0 [origin: LP-PPA-frederik-elwert-transcribe]
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic i686
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: i386
CrashDB: transcribe
CurrentDesktop: XFCE
Date: Sun Sep 7 21:10:36 2014
ExecutablePath: /usr/bin/transcribe
InstallationDate: Installed on 2014-09-04 (2 days ago)
InstallationMedia: Xubuntu 14.04.1 LTS "Trusty Tahr" - Release i386 (20140723)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/transcribe /home/username/Desktop/2014-09-06\ 22-45-37.3gp
ProcEnviron:
 LANGUAGE=en_PH:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_PH.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/transcribe', '/home/username/Desktop/2014-09-06 22-45-37.3gp']
SourcePackage: transcribe
ThirdParty: True
Title: transcribe crashed with ElementNotFoundError in __init__(): scaletempo
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo