If at startup, I choose to migrate my notes to Akonadi, the migration fails and knotes doesn't start without even showing a popup error message.
The log from kdebug is:

knotes(7425) KNoteUtils::migrateToAkonadi: Performing Akonadi migration. Good luck!
knotesmigrator(7434)/kresources KRES::Factory::self:
knotesmigrator(7434)/kdecore (KSycoca) KSycocaPrivate::openDatabase: Trying to open ksycoca from "/var/tmp/kdecache-raffaele/ksycoca4"
knotesmigrator(7434)/kresources KRES::ManagerImpl::ManagerImpl:
knotesmigrator(7434)/kresources KRES::ManagerImpl::readConfig:
knotesmigrator(7434)/kresources KRES::Factory::self:
knotesmigrator(7434)/kresources KRES::ManagerImpl::readResourceConfig: "CCzmMMIDxH"
knotesmigrator(7434)/kresources KRES::Factory::Private::resourceInternal: ( "file" , config )
knotesmigrator(7434)/kresources KRES::Factory::Private::resourceInternal: no such type "file"
knotesmigrator(7434)/kresources KRES::ManagerImpl::readResourceConfig: Failed to create resource with id "CCzmMMIDxH"
Bus::open: Can not get ibus-daemon's address.
IBusInputContext::createInputContext: no connection to ibus-daemon
knotesmigrator(7434)/kresources KRES::ManagerImpl::~ManagerImpl:
knotes(7425) KNoteUtils::migrateToAkonadi: Akonadi migration has been successful
knotes(7425)/kdeui (KNotification) KStatusNotifierItemDBus::KStatusNotifierItemDBus: service is "org.kde.StatusNotifierItem-7425-1"
knotes(7425)/kdeui (KNotification) KStatusNotifierItemPrivate::registerToDaemon: Registering a client interface to the KStatusNotifierWatcher
knotes(7425)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
raffaele@SeaWolf:~$ knotes(7425)/libakonadi Akonadi::EntityTreeModelPrivate::firstFetchJobDone: "Errore sconosciuto."


Reproducible: Always

Steps to Reproduce:
1. Start knotes
2. Choose to migrate to Akonadi
Actual Results:  
knotes doesn't start. No error message is shown.

Expected Results:  
knotes starts and shows my notes.