Hello.
Each file has its own unique ID. For example, ID=1234 in the editor. This ID can be seen in the document link (https://test.com/Products/Files/DocEditor.aspx?fileid=1234).
API methods require a different document.key:
https://api.onlyoffice.com/editors/config/document#key
Using a url as a document.key does not work. Tell me please, how can I find out the document.key of a specific document?