Creative Cloud API Endpoint Change?

Good Morning,

We have an integration, where we Post an asset to the creative Cloud. We followed this API specification https://developer.adobe.com/creative-cloud-libraries/docs/api/#tag/Library-Service/operation/postLibraryElements but it does not seem to work. Can it be that the schema of the request changed in the past 6 month and made new properties required? Could it be that the Documentation is not up to date? (6 Month ago the integration was still working and we were able to post assets to the creative Cloud through the mentioned API request).

Thank you very much for your support. 

best,

Julian