Unable to download apparently corrupted InDesign file from cloud storage

While working on a magazine in InDesign 21.0.1, my file (which I only had saved in the cloud) suddenly got corrupted (I think); and InDesign promptly crashed. I have not been able to open the file ever since; when I click it in InDesign's home view, the program instantly crashes, and when downloading it from CC's web view (adobe.com/files), I have to wait several minutes before the following error appears in my browser's console.

Export: ExportCloudDocs: : exportCloudDocs: id-1-miaiutr1-r0sm1dpwnrd export failed error: {"errorCode":"sensei-conversion-error","errorDesc":"Error: Conversion failed unexpected response from server, with 200"}
Export: ExportManager: convertAndDownloadFile: Not able to export file: id-1-miaiutr1-r0sm1dpwnrd: {"errorCode":"sensei-conversion-error","errorDesc":"Error: Conversion failed unexpected response from server, with 200"}

  The same behaviour occurs in the CC desktop app. There is no "timeline icon" visible when I click the file in CC, so I cannot restore a previous version. Please help me recover my file as soon as possible. In approx. 24 hours, the magazine needs to go to the printer.