I'm on Kubuntu 13.04, and I want to try out the new features of kdev-python. I'm building KDevelop from source and am having the same issues with both the tarballs and the latest code from git.

For each of the following: kdevplatform kdevelop kdevelop-pg-qt kdev-python
I'm performing the following:
cd $builddir
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
make -j5
sudo make install
sudo kbuildsyscoca4

everything seems to build fine, but when I start the application I get the following:

timm@kubuntu:~/src$ kdevelop
kdevelop(13717)/kdecore (trader) KServiceTypeTrader::defaultOffers: KServiceTypeTrader: serviceType "KDevelop/Plugin" not found
kdevelop(13717)/kdecore (trader) KServiceTypeTrader::defaultOffers: KServiceTypeTrader: serviceType "KDevelop/Plugin" not found
kdevelop(13717)/kdecore (trader) KServiceTypeTrader::defaultOffers: KServiceTypeTrader: serviceType "KDevelop/Plugin" not found
kdevelop(13717)/kdecore (trader) KServiceTypeTrader::defaultOffers: KServiceTypeTrader: serviceType "KDevelop/Plugin" not found
qrc:/main.qml:23:1: QML Loader: Binding loop detected for property "source"
static bool QDeclarativeMetaType::isModule(const QByteArray&, int, int) Qt 4.7 import detected; please note that Qt 4.7 is directly reusable as QtQuick 1.x with no code changes. Continuing, but startup time will be slower.
kdevelop(13717)/kdevplatform (shell) KDevelop::SessionControllerPrivate::performRecovery: Starting recovery from "/home/timm/.kde/share/apps/kdevelop/sessions/{c6934a52-37f9-463b-92c2-0719759b83e7}/recovery/current"
X Error: BadWindow (invalid Window parameter) 3
Major opcode: 20 (X_GetProperty)
Resource id: 0x4600013
kdevelop(13717)/kdevplatform (shell) KDevelop::SessionControllerPrivate::recoveryStorageTimeout: RECOVERY ERROR: Removing the old recovery backup directory failed in QDir( "/home/timm/.kde/share/apps/kdevelop/sessions/{c6934a52-37f9-463b-92c2-0719759b83e7}/recovery" , nameFilters = { * }, QDir::SortFlags( Name | IgnoreCase ) , QDir::Filters( Dirs|Files|Drives|AllEntries ) )
kdevelop(13717)/kdevplatform (shell) KDevelop::SessionControllerPrivate::recoveryStorageTimeout: RECOVERY ERROR: Removing the old recovery backup directory failed in QDir( "/home/timm/.kde/share/apps/kdevelop/sessions/{c6934a52-37f9-463b-92c2-0719759b83e7}/recovery" , nameFilters = { * }, QDir::SortFlags( Name | IgnoreCase ) , QDir::Filters( Dirs|Files|Drives|AllEntries ) )
kdevelop(13717)/kdevplatform (shell) KDevelop::SessionControllerPrivate::recoveryStorageTimeout: RECOVERY ERROR: Removing the old recovery backup directory failed in QDir( "/home/timm/.kde/share/apps/kdevelop/sessions/{c6934a52-37f9-463b-92c2-0719759b83e7}/recovery" , nameFilters = { * }, QDir::SortFlags( Name | IgnoreCase ) , QDir::Filters( Dirs|Files|Drives|AllEntries ) )
kdevelop(13717)/kdevplatform (shell) KDevelop::SessionControllerPrivate::recoveryStorageTimeout: RECOVERY ERROR: Removing the old recovery backup directory failed in QDir( "/home/timm/.kde/share/apps/kdevelop/sessions/{c6934a52-37f9-463b-92c2-0719759b83e7}/recovery" , nameFilters = { * }, QDir::SortFlags( Name | IgnoreCase ) , QDir::Filters( Dirs|Files|Drives|AllEntries ) )
kdevelop(13717)/kdevplatform (shell) KDevelop::SessionControllerPrivate::recoveryStorageTimeout: RECOVERY ERROR: Removing the old recovery backup directory failed in QDir( "/home/timm/.kde/share/apps/kdevelop/sessions/{c6934a52-37f9-463b-92c2-0719759b83e7}/recovery" , nameFilters = { * }, QDir::SortFlags( Name | IgnoreCase ) , QDir::Filters( Dirs|Files|Drives|AllEntries ) )

and when I click on "New Project" I get the following:

error: action path not found: ("project_new")
qrc:/Starting.qml:40: TypeError: Result of expression 'kdev.retrieveMenuAction("project/project_new")' [null] is not an object.
kdevelop(13717)/kdevplatform (shell) KDevelop::SessionControllerPrivate::recoveryStorageTimeout: RECOVERY ERROR: Removing the old recovery backup directory failed in QDir( "/home/timm/.kde/share/apps/kdevelop/sessions/{c6934a52-37f9-463b-92c2-0719759b83e7}/recovery" , nameFilters = { * }, QDir::SortFlags( Name | IgnoreCase ) , QDir::Filters( Dirs|Files|Drives|AllEntries ) )
kdevelop(13717)/kdevplatform (shell) KDevelop::SessionControllerPrivate::recoveryStorageTimeout: RECOVERY ERROR: Removing the old recovery backup directory failed in QDir( "/home/timm/.kde/share/apps/kdevelop/sessions/{c6934a52-37f9-463b-92c2-0719759b83e7}/recovery" , nameFilters = { * }, QDir::SortFlags( Name | IgnoreCase ) , QDir::Filters( Dirs|Files|Drives|AllEntries ) )

I found a bug report https://bugs.kde.org/show_bug.cgi?id=312069 from 2012 that is basically the same problem that I've been experiencing, but all they say is that it's a configuration issue and I need to go to the forums.

Hi,

As the bug mentions, please make very sure you don't have any of kdevelop or kdevplatform installed from your system package manager.

If that's not the reason, could you try with a new user account? That would make sure that it's not a user-local configuration issue.

Otherwise, you don't really need the "New Project" button, you can also use open/import.

Cheers,
Sven