When opening customizer (Dashboard/Design/Customizer) to change the pictures in the presentation page widgets area (Cryout Columns), there is no option to save.
Neither when changing in the widgets section directly (Dashboard / Design / Widgets) will the changes take effect.
I even deactivated all plugins, still no response.
Adding a new cryout column did work though, but not changing the picture in existing older ones.
WP 4.9.6_de
Nirvana latest version 1.4.4