Output of sudo dolphin:
Error: "/var/tmp/kdecache-sherif" is owned by uid 1000 instead of uid 0.
Error: "/tmp/kde-sherif" is owned by uid 1000 instead of uid 0.
Error: "/run/user/1000/ksocket-sherif" is owned by uid 1000 instead of uid 0.
Error: "/tmp/kde-sherif" is owned by uid 1000 instead of uid 0.
kdeinit4: Shutting down running client.
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
Error: "/run/user/1000/ksocket-sherif" is owned by uid 1000 instead of uid 0.
Error: "/tmp/kde-sherif" is owned by uid 1000 instead of uid 0.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Error: "/var/tmp/kdecache-sherif" is owned by uid 1000 instead of uid 0.
kbuildsycoca4 running...
Error: "/var/tmp/kdecache-sherif" is owned by uid 1000 instead of uid 0.
Error: "/var/tmp/kdecache-sherif" is owned by uid 1000 instead of uid 0.
QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: No such file or directory
QFileSystemWatcher: failed to add paths: /home/sherif/.config/ibus/bus
Bus::open: Can not get ibus-daemon's address. 
IBusInputContext::createInputContext: no connection to ibus-daemon 
org.kde.kactivities.activities: Starting the KDE Activity Manager daemon QDateTime("2015-06-09 20:59:18.332 EET Qt::LocalTime")
Error: "/run/user/1000/ksocket-sherif" is owned by uid 1000 instead of uid 0.
Error: "/tmp/kde-sherif" is owned by uid 1000 instead of uid 0.
dolphin(19328) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-excel.sheet.binary.macroEnabled.12" 
dolphin(19328) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-excel.addin.macroEnabled.12" 
dolphin(19328) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-powerpoint.slideshow.macroEnabled.12" 
dolphin(19328) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-excel.sheet.macroEnabled.12" 
dolphin(19328) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-powerpoint.presentation.macroEnabled.12" 
dolphin(19328) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-word.template.macroEnabled.12" 
dolphin(19328) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-excel.template.macroEnabled.12" 
dolphin(19328) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-powerpoint.template.macroEnabled.12" 
dolphin(19328) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-word.document.macroEnabled.12" 
dolphin(19328) KMimeTypeRepository::parents: "/usr/share/mime/subclasses"  refers to unknown mimetype  "application/vnd.ms-powerpoint.slide.macroEnabled.12" 
dolphin(19328) KSambaSharePrivate::findSmbConf: KSambaShare: Could not find smb.conf! 
kf5.kservice.sycoca: Trying to open ksycoca from "/home/sherif/.cache/ksycoca5"
org.kde.kactivities.application: [   OK   ] loaded:   "Event Spy"
org.kde.kactivities.application: [   OK   ] loaded:   "Share-Like-Connect"
Setting the name:  "org.kde.ActivityManager.Resources.Scoring"
Creating directory:  "/home/sherif/.local/share/kactivitymanagerd/resources/"
Database connection:  "kactivities_db_resources_139860043257728_readwrite" 
    query_only:          QVariant(qlonglong, 0) 
    journal_mode:        QVariant(QString, "wal") 
    wal_autocheckpoint:  QVariant(qlonglong, 100) 
    synchronous:         QVariant(qlonglong, 1)
QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: No such file or directory
org.kde.kactivities.application: [   OK   ] loaded:   "Sqlite Feeder"
Setting the name:  "org.kde.ActivityManager.ActivityTemplates"
org.kde.kactivities.application: [   OK   ] loaded:   "Activity Templates"
Service started, version: 6.2.0

Output after clicking on files:
Error: "/var/tmp/kdecache-sherif" is owned by uid 1000 instead of uid 0.
Error: "/tmp/kde-sherif" is owned by uid 1000 instead of uid 0.

Output after starting coping:
Error: "/var/tmp/kdecache-sherif" is owned by uid 1000 instead of uid 0.
X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 20 (X_GetProperty)
  Resource id:  0x1a000e4
X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 20 (X_GetProperty)
  Resource id:  0x1a000de