Hi sabienes. Welcome to the Hueman forum.
I adjusted the settings in that way, that I will have a left and a right sidebar on single posts
What adjustment did you make for this?
You might take a look at this post and see if it helps:
https://ww.wp.xz.cn/support/topic/blog-pages-with-two-sidebars?replies=10
And can you post a link to your site? Thanks.
I did the adjustments in the Theme Options.
These is working on the newer posts, but I have a few very old ones, f.e. from 2009 or 2010 and here I can see no sidebars.
My blog URL is:
http://www.sabienes.de/
Here is an example with a post with no sidebar: http://www.sabienes.de/bin-ich-schwanger/
Thank you!
Sabiene
The sidebar is displayed on the page you linked; it’s just being pushed below the content area. My guess is you have a conflict with one of your plugins. You might try disabling all the plugins and see if that fixes it. Then enable the plugins one at a time until you find the one that causes the issue.