Thank you for your reply. Unfortunaletly it also with LibreOffice stable release it does not work. Surprisingly it works with MS Word without any problems. But all my work with standard templates etc. is done with Libre Office and I would prefer to stay with LibreOffice.

Thank you for your prompt response. Fortunately, this combination works:
Libre Office version 24.8.7.2
Zotero version 7.0.22 (32-bit)
Java version 8 Update 461 (64-bit).
There is still one small limitation:
The above-mentioned Libre Office version is a 64-bit version, in which my dictation program Nuance Dragon Professional (15.61) does not work without a dictation window. This is very inconvenient for my project work. To dictate directly in Libre Office, I would need a 32-bit version of Libre Office.
1. Could you please also provide Libre Office version 24.8.7.2 or newer in 32-bit, preferably with offline help?
2. How should I proceed with future updates?

Thank you again for your quick help and thank you in advance for your further response.

Translated with DeepL.com (free version)

Thank you very much. My work environment is now functioning perfectly again. Your contributions were extremely helpful.

Thanks for the quick reply.
Unfortunately, the citation now works differently.
The citation is now included in the footnote along with the reference.
Previously, the citation was inserted into the running text (with a footnote number) and the reference was included in the footnote with the corresponding footnote number. I would prefer it to remain that way.

Could you provide an example? This shouldn't have changed at all