By add Org get 500

Hello together

I have activated the Org function and wanted to add an Org. But I get a 500. Are there any logs somewhere?

Request URL: https://xxxx.xxx/api/v2.1/admin/organizations/
Request Method: POST
Status Code: 500 Internal Server Error

Thank you very much!

SeaDrive Env:

Docker
SeaDrive: 11.0.12
behind of a nginx

nothing special in the logs. Any idea?