“File format is not supported in file ‘C:\Users\nnnem\Desktop\oni.blend’”
Trying to open autosave gives the line:
“Loading ‘C:\Users\nnnem\AppData\Local\Temp\oni_12404_autosave.blend’ failed: Failed to read blend file ‘C:\Users\nnnem\AppData\Local\Temp\oni_12404_autosave.blend’: Missing DNA block”
I spent all day working on this yesterday and I am really hoping to be able to fix it.
Have you tried appending everything from the file into a new Blend file?
C:\Users\nnnom\AppData\Local\Temp is a temporary storage folder.
It is automatically deleted after a certain period of time.
Access the folder directly to see if the file exists
Like @Magnavis says, try to append your data into a new file.
And for the next time, got to Preferences>File Paths>Temporary Files and set a folder on another disk, your desktop etc.