Cannot edit card in backend

Hello,
I have installed the free version.
In another domain that uses almost the same modules and theme the free version works without problems. Above all I use the same plan https://www.sportinternat-knechtsteden.de/kontakt/lageplan/ and thought I could work with an export and import.
Unfortunately this did not work.
In the backend I had imported the data and adjusted the domain name, but the map was not displayed.
So I uninstalled the module and reinstalled it. Unfortunately the database tables were not deleted.
My old data was still in the backend. I deleted them and started to recreate the map by hand, but still couldn’t see the map in frontend.
Via the frontend I could create a new map by clicking on Error in abckendthe link “edit map”. This also worked wonderfully for the frontend. After logging out and logging in, I could see the map in the frontend and it works as desired, but I can’t edit it in the backend. Here I see the map that does not work in the frontend.
What can I do?

with best regards
Mira

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