This is exactly what was needed! Many thanks! I will continue to be more attentive.
Continuing the topic. How to configure advanced settings in shortcode: Numbers of post visible at a time in scroller, Speed, Pause time?
It works, thank you! Without thumbnail, actualy, but it’s ok.
I have a similar problem. Earlier gallery inserted as a thumbnail, now it is inserted as long shortcode and in the frontend not displayed at all.
Here the result into frontend: