For future reference:
Try to launch the app from the terminal and post the output. The information you gave was too sparse. In other words, the more information you give, the quicker you can get help, and the quicker others can help you track down the problem.
libqtweb...something or other was missing.
Are we supposed to guess? Please be specific. "something or other" won't help us to fix anything.
If all dependencies are not installed with an app, a post about it in Broken Packages is needed.
I would like to know how to mark my posts as "solved" when that happens.
Go to your first post in the thread and click the Modify button. Add [SOLVED] to the topic/title.