Images won’t change

Hi.

I cannot get it to work, have used it before since D7, using in views as format, having multiple images (deactivated "Display all values in the same row") and all libraries are installed. Also, i switched themes (bootstrap5 and olivero) … same result. The automatic sliding does not work nor manually sliding via pager or controls, the 1st loaded image is beeing displayed only.

Anyone a tip to set up something additionally when using D11?

Thanks!