I have downloaded the offline installer for Qt 5.5.1 for Linux 64-bit. Whenever QT Creator starts, an error message appears saying that the Help cannot be loaded.

QT/Tools/QtCreator/lib/qtcreator/plugins/libHelp.so: (libgstapp-0.10.so.0: cannot open shared object file: No such file or directory)

QT Error Message

How can I get the help files? My system is 64bit Ubuntu 15.10.

  • Did you try playing around with Help > About Plugins?
    – Anon
    Dec 12, 2015 at 20:21
  • 1
    @Akiva Yes. In About Plugins, the Help file has an red x. I tried disabling and enabling it. It does not work. As well, the libHelp.so file is in the folder that it supposed to be in.
    – GSM-S
    Dec 17, 2015 at 14:09
  • Is there a reason why you need the offline installer for Qt 5? Are you using Qt Creator or the Ubuntu SDK?
    – Anon
    Dec 17, 2015 at 14:12
  • 1
    I prefer offline installers in order to quickly reinstall programs on other computers. I am using the QT Creator that came with the offline installer.
    – GSM-S
    Dec 18, 2015 at 20:40
  • Trying the SDK via the online installer wouldn't be a solution then for you, right? The only time I ever build from source is when I'm developing a plugin for it.
    – Anon
    Dec 20, 2015 at 11:00

1 Answer 1


Install some possibly required gstreamer-plugins using this command:

sudo apt-get install libgstreamer-plugins-base0.10-0 
  • This solution also works for Ubuntu 16.04 and Qt Creator 3.5.1 (opensource) Based on Qt 5.5.1.
    – max
    Sep 6, 2017 at 20:07

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.