[ubuntu] Kdenlive crash at startup

sudo kdenlive
Icon theme "oxygen" not found.
Icon theme "oxygen" not found.
Error: standard icon theme "oxygen" not found!
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
QWidget::setMaximumSize: (/QToolButton) Negative sizes (2,-2) are not possible
Removing cache at "/home/whitehand/.cache/kdenlive-thumbs.kcache"
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
OpenGL vendor: "X.Org"
OpenGL renderer: "Gallium 0.4 on AMD TONGA (DRM 3.1.0, LLVM 3.8.0)"
OpenGL ARG_SYNC: true
OpenGL OpenGLES: false
OpenGL vendor: "X.Org"
OpenGL renderer: "Gallium 0.4 on AMD TONGA (DRM 3.1.0, LLVM 3.8.0)"
OpenGL ARG_SYNC: true
OpenGL OpenGLES: false
Neoprávněný přístup do paměti (SIGSEGV) (core dumped [obraz paměti uložen])