After having posted the following issue, I found the solution, but did not see a possibility to delete it now - I apologize !!!
Dear all,
After having updated to the newest version of X, I’m now missing the featured images on my blog index page (oils4you.de/blog).
The page should look like this one, but actually looks like that one.
Can you estimate which error I made or which setting I have to change?
Thanks a lot in advance
Holger