Im trying to display a map with all posts from the Custom Post Type "kanzleien" which uses the toolset adress field.
Single Markers will be shown, but when i choose the posts like in your tutorial they will not be displayed: https://toolset.com/course-lesson/displaying-a-list-of-posts-on-a-map/
Here ist the dev site: hidden link
password: ap2022
I had a look at the page and found no issue with the setup. This leads me to believe that there is possibly some plugin conflict.
In a case like this when the plugins are not functioning as intended we recommended that you disable the non-toolset plugins.
What this means is that you will need to go through your list of plugins and disable each of your plugins one at a time while checking to see if the issue still remains.