Hi @bluisier,
thanks for your reply. Your idea sounds good and I directly checked for it. Since I have the issue I did not install a new plugin. The only thing I changed was to change the API key and since that I have this issue.
I deactivated all plugins for a moment but even then I got the error message.
The only plugin about optimization I use is a plugin called “Optimize Database after Deleting Revisions”. Would it might be possible that some issue is coming from this?
Do you have an idea what I could do to test this?
Greetings and happy easter ??
Marius