Hi zillflor,
I'm sorry to hear you're having an issue with drawings. I'm assuming you're on Windows. Can you please try the following:
1. Close Fusion > Launch Windows Task Manager > Are there any AcCoreConsole or Fusion Drawings Console processes still running? If so End Process for these
2. Launch Windows Explorer > Enter %LOCALAPPDATA% as the folder
3. Open Autodesk\Autodesk Fusion 360, you should see a folder named AcCore
4. Rename the folder (AcCore_BAK) > Launch Fusion and try to open or create a drawing
If this solves your problem please let me know and if you can, please zip up and send me (christopher.miller@autodesk.com) both the BAK and new AcCore folders.
If this doesn't fix the problem, what OS are you using? Is the system locale/format set to English or something else?
Thanks,
Chris