Try installing qtdeclarative5-ubuntu-content1, that should solve the issue:
sudo apt install qtdeclarative5-ubuntu-content1 ** Changed in: webbrowser-app (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to webbrowser-app in Ubuntu. https://bugs.launchpad.net/bugs/1626667 Title: Can't upload files using webapp-container Status in webbrowser-app package in Ubuntu: Invalid Bug description: I'm not able to upload files using webapp-container. I've tried this: 1. $ webapp-container wiki.ubuntu-it.org 2. login to the italian wiki 3. click on the "attachment" link 4. click on the icon to upload files Expected: a window for upload files should open Swat happens: error in the terminal: "FilePicker::Show: Content requested a file picker, but the application hasn't provided one" This is the complete output from the terminal: $ webapp-container wiki.ubuntu-it.org Invalid webapp webapp definition: homepage not found or fails predicate isString Could not open manifest file: "/usr/share/unity-webapps/userscripts/unity-webapps-amazon/manifest.json" qml: Loading webview on /home/alessandro/.local/share/webbrowser-app Invalid webapp webapp definition: homepage not found or fails predicate isString Could not open manifest file: "/usr/share/unity-webapps/userscripts/unity-webapps-amazon/manifest.json" QQmlExpression: Expression file:///usr/share/webbrowser-app/webcontainer/WebApp.qml:272:25 depends on non-NOTIFYable properties: unity::action::qml::ActionManager::globalContext qml: Loaded 5 UA override(s) from file:///usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Web/ua-overrides-mobile.js qml: Start browsing file:///usr/share/webbrowser-app/webcontainer/ContentPickerDialog.qml:22:1: module "Ubuntu.Content" is not installed file:///usr/share/webbrowser-app/webcontainer/ContentDownloadDialog.qml:22:1: module "Ubuntu.Content" is not installed file:///usr/share/webbrowser-app/ContentHandler.qml:20:1: module "Ubuntu.Content" is not installed file:///usr/share/webbrowser-app/Downloader.qml:22:1: module "Ubuntu.DownloadManager" is not installed file:///usr/share/webbrowser-app/Downloader.qml:23:1: module "Ubuntu.Content" is not installed file:///usr/share/webbrowser-app/Downloader.qml:22:1: module "Ubuntu.DownloadManager" is not installed file:///usr/share/webbrowser-app/Downloader.qml:23:1: module "Ubuntu.Content" is not installed qml: Loaded 5 UA override(s) from file:///usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Web/ua-overrides-desktop.js [0922/191134:ERROR:layer_tree_host_impl.cc(2250)] Forcing zero-copy tile initialization as worker context is missing TouchSelectionController::active is deprecated, use TouchSelectionController::status instead FilePicker::Show: Content requested a file picker, but the application hasn't provided one FilePicker::Show: Content requested a file picker, but the application hasn't provided one FilePicker::Show: Content requested a file picker, but the application hasn't provided one FilePicker::Show: Content requested a file picker, but the application hasn't provided one FilePicker::Show: Content requested a file picker, but the application hasn't provided one ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: webapp-container 0.23+16.04.20160413-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19 Uname: Linux 4.4.0-38-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: Unity Date: Thu Sep 22 19:14:06 2016 InstallationDate: Installed on 2016-08-30 (22 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) SourcePackage: webbrowser-app UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/webbrowser-app/+bug/1626667/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp