Joomla 6.1.0
template: Gym
URL:  oldenglishsheepdog.info

after upgrade from 5.4 to 6.1.0 the UIKIT modules don't show properly; in stead of slideshow I see all pictures listed vertically all at once.
Same for slide Portfolio module. 

I miss also some fields for the content in the slides, background settings etc. The tutorial refers to Joomla 3  

This usually happens when you forget to activate the UIKIT Framework plugin. Go to the downloads section here in the forum and download the latest version 4.0.15 of the UIKIT plugin. Then install and activate it in the backend. If the old UIKIT plugin is still installed, you must uninstall it. You cannot uninstall both at the same time.

www.joomlaplates.com/login.html?folder=uikit%252Fplugin
 

yep, that was the solution. Thanks!